diff --git a/src/AdvancedSearchQueryTerm.php b/src/AdvancedSearchQueryTerm.php
index b5aa2d8..161fc3b 100644
--- a/src/AdvancedSearchQueryTerm.php
+++ b/src/AdvancedSearchQueryTerm.php
@@ -302,7 +302,7 @@ class AdvancedSearchQueryTerm {
           return $value;
         }
         else {
-          return $value . " OR " . str_replace('"', "", trim($value));
+          return "(" .$value . " OR " . str_replace('"', "", trim($value)) . ")";
         }
       }
       if (!$this->getInclude()) {