diff --git a/htdocs/api/class/api.class.php b/htdocs/api/class/api.class.php
index f09ba8ad784..6fe7b1d3398 100644
--- a/htdocs/api/class/api.class.php
+++ b/htdocs/api/class/api.class.php
@@ -331,8 +331,8 @@ class DolibarrApi
 	protected function _checkFilters($sqlfilters, &$error = '')
 	{
 		// phpcs:enable
-
-		return dolCheckFilters($sqlfilters, $error);
+		$firstandlastparenthesis = 0;
+		return dolCheckFilters($sqlfilters, $error, $firstandlastparenthesis);
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 63092257c99..4240e5fbe60 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -10699,40 +10699,9 @@ class Form
 			// Split the criteria on each AND
 			//var_dump($search_component_params_hidden);
 
-			$nbofchars = dol_strlen($search_component_params_hidden);
-			$arrayofandtags = array();
-			$i = 0;
-			$s = '';
-			$countparenthesis = 0;
-			while ($i < $nbofchars) {
-				$char = dol_substr($search_component_params_hidden, $i, 1);
-
-				if ($char == '(') {
-					$countparenthesis++;
-				} elseif ($char == ')') {
-					$countparenthesis--;
-				}
-
-				if ($countparenthesis == 0) {
-					$char2 = dol_substr($search_component_params_hidden, $i+1, 1);
-					$char3 = dol_substr($search_component_params_hidden, $i+2, 1);
-					if ($char == 'A' && $char2 == 'N' && $char3 == 'D') {
-						// We found a AND
-						$arrayofandtags[] = trim($s);
-						$s = '';
-						$i+=2;
-					} else {
-						$s .= $char;
-					}
-				} else {
-					$s .= $char;
-				}
-				$i++;
-			}
-			if ($s) {
-				$arrayofandtags[] = trim($s);
-			}
+			$arrayofandtags = dolForgeExplodeAnd($search_component_params_hidden);
 
+			// $arrayofandtags is now array( '...' , '...', ...)
 			// Show each AND part
 			foreach ($arrayofandtags as $tmpkey => $tmpval) {
 				$errormessage = '';
@@ -10792,22 +10761,38 @@ class Form
 		$ret .= '</div>';
 
 		$ret .= "<!-- Field to enter a generic filter string: t.ref:like:'SO-%', t.date_creation:<:'20160101', t.date_creation:<:'2016-01-01 12:30:00', t.nature:is:NULL, t.field2:isnot:NULL -->\n";
-		$ret .= '<input type="text" placeholder="' . $langs->trans("Search") . '" name="search_component_params_input" class="noborderbottom search_component_input" value="">';
+		$ret .= '<input type="text" placeholder="' . $langs->trans("Filters") . '" name="search_component_params_input" class="noborderbottom search_component_input" value="">';
 
 		$ret .= '</div>';
 		$ret .= '</div>';
 
 		$ret .= '<script>
-		jQuery(".tagsearchdelete").click(function() {
-			var filterid = $(this).parents().data("ufilterid");
-			console.log("We click to delete a criteria nb "+filterid);
-			// TODO Update the search_component_params_hidden with all data-ufilter except the one delete and post page
+		jQuery(".tagsearchdelete").click(function(e) {
+			var filterid = $(this).parents().attr("data-ufilterid");
+			console.log("We click to delete the criteria nb "+filterid);
 
+			// Regenerate the search_component_params_hidden with all data-ufilter except the one to delete, and post the page
+			var newparamstring = \'\';
+			$(\'.tagsearch\').each(function(index, element) {
+				console.log(element);
+				tmpfilterid = $(this).attr("data-ufilterid");
+				if (tmpfilterid != filterid) {
+					// We keep this criteria
+					if (newparamstring == \'\') {
+						newparamstring = $(this).attr("data-ufilter");
+					} else {
+						newparamstring = newparamstring + \' AND \' + $(this).attr("data-ufilter");
+					}
+				}
+			});
+			console.log(newparamstring);
+
+			// We repost the form
+			$(this).closest(\'form\').submit();
 		});
 		</script>
 		';
 
-
 		return $ret;
 	}
 
diff --git a/htdocs/core/customreports.php b/htdocs/core/customreports.php
index 6788196e743..e6afd21c3e2 100644
--- a/htdocs/core/customreports.php
+++ b/htdocs/core/customreports.php
@@ -163,12 +163,16 @@ $extrafields->fetch_name_optionals_label('all');	// We load all extrafields defi
 $search_array_options = $extrafields->getOptionalsFromPost($object->table_element, '', 'search_');
 
 $search_component_params = array('');
-$search_component_params_hidden = GETPOST('search_component_params_hidden', 'alphanohtml');
+$search_component_params_hidden = trim(GETPOST('search_component_params_hidden', 'alphanohtml'));
+$search_component_params_input = trim(GETPOST('search_component_params_input', 'alphanohtml'));
+//var_dump($search_component_params_hidden);
+//var_dump($search_component_params_input);
 
-// For the case we enter a criteria manually, the search_component_params_input will be defined and must be used in priority
-if (GETPOST('search_component_params_input', 'alphanohtml')) {
-	$search_component_params_hidden = GETPOST('search_component_params_input', 'alphanohtml');
-}
+$arrayofandtagshidden = dolForgeExplodeAnd($search_component_params_hidden);
+$arrayofandtagsinput = dolForgeExplodeAnd($search_component_params_input);
+
+$search_component_params_hidden = implode(' AND ', array_merge($arrayofandtagshidden, $arrayofandtagsinput));
+//var_dump($search_component_params_hidden);
 
 $MAXUNIQUEVALFORGROUP = 20;
 $MAXMEASURESINBARGRAPH = 20;
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 1a7e95c6337..43da017f2db 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -12517,9 +12517,10 @@ function jsonOrUnserialize($stringtodecode)
 /**
  * forgeSQLFromUniversalSearchCriteria
  *
- * @param 	string		$filter		String with universal search string. Must be '(aaa:bbb:...) OR (ccc:ddd:...) ...' with
+ * @param 	string		$filter		String with universal search string. Must be '(aaa:bbb:ccc) OR (ddd:eeee:fff) ...' with
  * 									aaa is a field name (with alias or not) and
  * 									bbb is one of this operator '=', '<', '>', '<=', '>=', '!=', 'in', 'notin', 'like', 'notlike', 'is', 'isnot'.
+ * 									ccc must not contains ( or )
  * 									Example: '((client:=:1) OR ((client:>=:2) AND (client:<=:3))) AND (client:!=:8) AND (nom:like:'a%')'
  * @param	string		$errorstr	Error message string
  * @param	int			$noand		1=Do not add the AND before the condition string.
@@ -12535,8 +12536,9 @@ function forgeSQLFromUniversalSearchCriteria($filter, &$errorstr = '', $noand =
 	}
 
 	$regexstring = '\(([a-zA-Z0-9_\.]+:[<>!=insotlke]+:[^\(\)]+)\)';	// Must be  (aaa:bbb:...) with aaa is a field name (with alias or not) and bbb is one of this operator '=', '<', '>', '<=', '>=', '!=', 'in', 'notin', 'like', 'notlike', 'is', 'isnot'
+	$firstandlastparenthesis = 0;
 
-	if (!dolCheckFilters($filter, $errorstr)) {
+	if (!dolCheckFilters($filter, $errorstr, $firstandlastparenthesis)) {
 		if ($noerror) {
 			return '1 = 2';
 		} else {
@@ -12560,35 +12562,118 @@ function forgeSQLFromUniversalSearchCriteria($filter, &$errorstr = '', $noand =
 	return ($noand ? "" : " AND ").($nopar ? "" : '(').preg_replace_callback('/'.$regexstring.'/i', 'dolForgeCriteriaCallback', $filter).($nopar ? "" : ')');
 }
 
+/**
+ * Explode an universal search string with AND parts
+ *
+ * @param 	string			$sqlfilters			Universal SQL filter string. Must have been trimmed before.
+ * @return 	array								Array of AND
+ */
+function dolForgeExplodeAnd($sqlfilters)
+{
+	$arrayofandtags = array();
+	$nbofchars = dol_strlen($sqlfilters);
+
+	$i = 0;
+	$s = '';
+	$countparenthesis = 0;
+	while ($i < $nbofchars) {
+		$char = dol_substr($sqlfilters, $i, 1);
+
+		if ($char == '(') {
+			$countparenthesis++;
+		} elseif ($char == ')') {
+			$countparenthesis--;
+		}
+
+		if ($countparenthesis == 0) {
+			$char2 = dol_substr($sqlfilters, $i+1, 1);
+			$char3 = dol_substr($sqlfilters, $i+2, 1);
+			if ($char == 'A' && $char2 == 'N' && $char3 == 'D') {
+				// We found a AND
+				$s = trim($s);
+				if (!preg_match('/^\(.*\)$/', $s)) {
+					$s = '('.$s.')';
+				}
+				$arrayofandtags[] = $s;
+				$s = '';
+				$i+=2;
+			} else {
+				$s .= $char;
+			}
+		} else {
+			$s .= $char;
+		}
+		$i++;
+	}
+	if ($s) {
+		$s = trim($s);
+		if (!preg_match('/^\(.*\)$/', $s)) {
+			$s = '('.$s.')';
+		}
+		$arrayofandtags[] = $s;
+	}
+
+	return $arrayofandtags;
+}
+
 /**
  * Return if a $sqlfilters parameter has a valid balance of parenthesis
  *
- * @param	string  		$sqlfilters     sqlfilter string
- * @param	string			$error			Error message
- * @return 	boolean			   				True if valid, False if not valid ($error is filled with the reason in such a case)
+ * @param	string  		$sqlfilters     	Universal SQL filter string. Must have been trimmed before.
+ * @param	string			$error				Returned error message
+ * @param	int				$parenthesislevel	Returned level of global parenthesis that we can remove/siplify, 0 if error or we cant simplify.
+ * @return 	boolean			   					True if valid, False if not valid ($error returned parameter is filled with the reason in such a case)
  */
-function dolCheckFilters($sqlfilters, &$error = '')
+function dolCheckFilters($sqlfilters, &$error = '', &$parenthesislevel = 0)
 {
 	//$regexstring='\(([^:\'\(\)]+:[^:\'\(\)]+:[^:\(\)]+)\)';
 	//$tmp=preg_replace_all('/'.$regexstring.'/', '', $sqlfilters);
 	$tmp = $sqlfilters;
-	$i = 0;
-	$nb = strlen($tmp);
+
+	$nb = dol_strlen($tmp);
 	$counter = 0;
+	$parenthesislevel = 0;
+
+	$error = '';
+
+	$i = 0;
 	while ($i < $nb) {
-		if ($tmp[$i] == '(') {
+		$char = dol_substr($tmp, $i, 1);
+
+		if ($char == '(') {
+			if ($i == $parenthesislevel && $parenthesislevel == $counter) {
+				// We open a parenthesis and it is the first char
+				$parenthesislevel++;
+			}
 			$counter++;
-		}
-		if ($tmp[$i] == ')') {
+		} elseif ($char == ')') {
+			$nbcharremaining = ($nb - $i - 1);
+			if ($nbcharremaining >= $counter) {
+				$parenthesislevel = min($parenthesislevel, $counter - 1);
+			}
+			if ($parenthesislevel > $counter && $nbcharremaining >= $counter) {
+				$parenthesislevel = $counter;
+			}
 			$counter--;
 		}
+
 		if ($counter < 0) {
-			$error = "Wrond balance of parenthesis in sqlfilters=".$sqlfilters;
+			$error = "Wrong balance of parenthesis in sqlfilters=".$sqlfilters;
+			$parenthesislevel = 0;
 			dol_syslog($error, LOG_WARNING);
 			return false;
 		}
+
 		$i++;
 	}
+
+	if ($counter > 0) {
+		$error = "Wrong balance of parenthesis in sqlfilters=".$sqlfilters;
+		$parenthesislevel = 0;
+		dol_syslog($error, LOG_WARNING);
+		return false;
+	}
+
 	return true;
 }
 
@@ -12703,7 +12788,7 @@ function dolForgeCriteriaCallback($matches)
  */
 function getTimelineIcon($actionstatic, &$histo, $key)
 {
-	global $conf, $langs;
+	global $langs;
 
 	$out = '<!-- timeline icon -->'."\n";
 	$iconClass = 'fa fa-comments';
diff --git a/htdocs/user/class/user.class.php b/htdocs/user/class/user.class.php
index 1c974597524..ddc765bfb3d 100644
--- a/htdocs/user/class/user.class.php
+++ b/htdocs/user/class/user.class.php
@@ -383,8 +383,8 @@ class User extends CommonObject
 
 	public $fields = array(
 		'rowid'=>array('type'=>'integer', 'label'=>'TechnicalID', 'enabled'=>1, 'visible'=>-2, 'notnull'=>1, 'index'=>1, 'position'=>1, 'comment'=>'Id'),
-		'lastname'=>array('type'=>'varchar(50)', 'label'=>'LastName', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'showoncombobox'=>1, 'index'=>1, 'position'=>20, 'searchall'=>1),
-		'firstname'=>array('type'=>'varchar(50)', 'label'=>'FirstName', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'showoncombobox'=>1, 'index'=>1, 'position'=>10, 'searchall'=>1),
+		'lastname'=>array('type'=>'varchar(50)', 'label'=>'Lastname', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'showoncombobox'=>1, 'index'=>1, 'position'=>20, 'searchall'=>1),
+		'firstname'=>array('type'=>'varchar(50)', 'label'=>'Firstname', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'showoncombobox'=>1, 'index'=>1, 'position'=>10, 'searchall'=>1),
 		'ref_employee'=>array('type'=>'varchar(50)', 'label'=>'RefEmployee', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'showoncombobox'=>1, 'index'=>1, 'position'=>30, 'searchall'=>1),
 		'national_registration_number'=>array('type'=>'varchar(50)', 'label'=>'NationalRegistrationNumber', 'enabled'=>1, 'visible'=>1, 'notnull'=>1, 'showoncombobox'=>1, 'index'=>1, 'position'=>40, 'searchall'=>1)
 	);
@@ -4132,12 +4132,10 @@ class User extends CommonObject
 
 		$this->findUserIdByEmailCache[$email] = -1;
 
-		global $conf;
-
 		$sql = 'SELECT rowid';
 		$sql .= ' FROM '.$this->db->prefix().'user';
 		if (getDolGlobalString('AGENDA_DISABLE_EXACT_USER_EMAIL_COMPARE_FOR_EXTERNAL_CALENDAR')) {
-			$sql .= " WHERE email LIKE '%".$this->db->escape($email)."%'";
+			$sql .= " WHERE email LIKE '%".$this->db->escape($this->db->escapeforlike($email))."%'";
 		} else {
 			$sql .= " WHERE email = '".$this->db->escape($email)."'";
 		}
diff --git a/test/phpunit/FunctionsLibTest.php b/test/phpunit/FunctionsLibTest.php
index b28e945e28d..204191e89b9 100644
--- a/test/phpunit/FunctionsLibTest.php
+++ b/test/phpunit/FunctionsLibTest.php
@@ -176,6 +176,64 @@ class FunctionsLibTest extends PHPUnit\Framework\TestCase
 	}
 
 
+	/**
+	 * testDolCheckFilters
+	 *
+	 * @return boolean
+	 */
+	public function testDolCheckFilters()
+	{
+		global $conf, $langs, $db;
+
+		// A sql with global parenthesis at level 2
+		$error = '';
+		$parenthesislevel = 0;
+		$sql = '(( ... (a:=:1) .éééé. (b:=:1) ... ))';
+		$result = dolCheckFilters($sql, $error, $parenthesislevel);
+		$this->assertEquals(2, $parenthesislevel);
+		$this->assertTrue($result);
+
+		// A sql with global parenthesis at level 2
+		$error = '';
+		$parenthesislevel = 0;
+		$sql = '(((((a:=:1) ... ) .éééé.. (b:=:1) ..) ... ))';
+		$result = dolCheckFilters($sql, $error, $parenthesislevel);
+		$this->assertEquals(2, $parenthesislevel);
+		$this->assertTrue($result);
+
+		// A sql with global parenthesis at level 2
+		$error = '';
+		$parenthesislevel = 0;
+		$sql = '((... (((a:=:1) ... ( .éééé.. (b:=:1) ..)))))';
+		$result = dolCheckFilters($sql, $error, $parenthesislevel);
+		$this->assertEquals(2, $parenthesislevel);
+		$this->assertTrue($result);
+
+		// A sql with global parenthesis at level 0
+		$error = '';
+		$parenthesislevel = 0;
+		$sql = '(a:=:1) ... (b:=:1) éééé ...';
+		$result = dolCheckFilters($sql, $error, $parenthesislevel);
+		$this->assertEquals(0, $parenthesislevel);
+		$this->assertTrue($result);
+
+		// A sql with bad balance
+		$error = '';
+		$parenthesislevel = 0;
+		$sql = '((((a:=:1) ... (b:=:1) éééé ..))';
+		$result = dolCheckFilters($sql, $error, $parenthesislevel);
+		$this->assertEquals(0, $parenthesislevel);
+		$this->assertFalse($result);
+
+		// A sql with bad balance
+		$error = '';
+		$parenthesislevel = 0;
+		$sql = '(((a:=:1) ... (b:=:1) éééé ..)))';
+		$result = dolCheckFilters($sql, $error, $parenthesislevel);
+		$this->assertEquals(0, $parenthesislevel);
+		$this->assertFalse($result);
+	}
+
 	/**
 	 * testDolForgeCriteriaCallback
 	 *