fix usage of parenthesis in search

CHANGELOG.md

@@ -85,3 +85,4 @@ Master branch
 =============
 
 - fix errors in pagination
+- fix search: usage of parenthesis

Search/AbstractSearch.php

@@ -76,7 +76,14 @@ abstract class AbstractSearch implements SearchInterface
         foreach ($supportedTerms as $term) {
             if (array_key_exists($term, $terms) && $term !== '_default') {
                 $recomposed .= ' '.$term.':';
+                $containsSpace = \strpos($terms[$term], " ") !== false;
+                if ($containsSpace) {
+                    $recomposed .= "(";
+                }
                 $recomposed .= (mb_stristr(' ', $terms[$term]) === FALSE) ?  $terms[$term] : '('.$terms[$term].')';
+                if ($containsSpace) {
+                    $recomposed .= ")";
+                }
             }
         }