diff --git a/src/AdvancedSearchQuery.php b/src/AdvancedSearchQuery.php
index af40fb7..b8c6eb7 100644
--- a/src/AdvancedSearchQuery.php
+++ b/src/AdvancedSearchQuery.php
@@ -143,6 +143,7 @@ class AdvancedSearchQuery {
   public function alterQuery(Request $request, SolariumQueryInterface &$solarium_query, DrupalQueryInterface $search_api_query) {
     // Only apply if a Advanced Search Query was made.
     $terms = $this->getTerms($request);
+
     if (!empty($terms)) {
       $index = $search_api_query->getIndex();
       /** @var \Drupal\search_api_solr\Plugin\search_api\backend\SearchApiSolrBackend $backend */
@@ -163,11 +164,10 @@ class AdvancedSearchQuery {
 
       if (!$isDismax) {
         // To support negative queries we must first bring in all documents.
-        $q[] = $this->negativeQuery($terms) ? "*:*" : "";
+        $q = $this->negativeQuery($terms) ? "*:*" : "";
       }
-
       $term = array_shift($terms);
-      $q[] = $term->toSolrQuery($field_mapping);
+      $q = '(' . trim($term->toSolrQuery($field_mapping));
 
       // New.
       $fields_list[] = $term->toSolrFields($field_mapping);
@@ -180,8 +180,8 @@ class AdvancedSearchQuery {
 
       // For multiple conditions.
       foreach ($terms as $term) {
-        $q[] = $term->getConjunction();
-        $q[] = $term->toSolrQuery($field_mapping);
+        $q .= ')' . $term->getConjunction() . '(';
+        $q .= trim($term->toSolrQuery($field_mapping));
 
         // New.
         $fields_list[] = $term->toSolrFields($field_mapping);
@@ -193,8 +193,8 @@ class AdvancedSearchQuery {
         }
 
       }
-      $q = implode(' ', $q);
 
+      $q .= ')';
       // Limit extra processing if Luncene Search is enable.
       if ($isDismax) {
 
@@ -257,7 +257,7 @@ class AdvancedSearchQuery {
           foreach ($index->getFields() as $field_id => $field) {
               $boostedFields[$field_id] = $field->getBoost();
           }
-          
+
           $str_fields_with_boost = "";
           // Adding a boost number for each field)
           foreach($query_fields as $solr_field) {
@@ -291,11 +291,9 @@ class AdvancedSearchQuery {
         // make this field non-empty.
         //$search_api_query->keys("advanced search");
       }
-
       $solarium_query->setQuery($q);
     }
   }
-
   /**
    * Alters the given view to be recursive if applicable.
    *