yes it's possible to do so by updating FilterHelper::_contain method in PHP code.
public static function _contain($dataIndx, &$fcrule, &$param, $value){
$_fcrule = array();
$arr = explode("+", $value);
foreach ($arr as $val) {
$_fcrule[] = $dataIndx . " like CONCAT('%', ?, '%')";
$param[] = $val;
}
$fcrule[] = implode(" AND ", $_fcrule);
}