diff --git a/web/modules/custom/materio_sapi/src/Controller/Base.php b/web/modules/custom/materio_sapi/src/Controller/Base.php
index 4de3e5ae..f016a49e 100644
--- a/web/modules/custom/materio_sapi/src/Controller/Base.php
+++ b/web/modules/custom/materio_sapi/src/Controller/Base.php
@@ -51,7 +51,7 @@ class Base extends ControllerBase {
     //  - " edismax " => ???
     $parse_mode = \Drupal::service('plugin.manager.search_api.parse_mode')
       ->createInstance('direct');
-    $parse_mode->setConjunction('OR');
+    $parse_mode->setConjunction('AND');
     $this->query->setParseMode($parse_mode);
 
     // Set fulltext search keywords and fields.
@@ -88,7 +88,7 @@ class Base extends ControllerBase {
 
     // filter the search
     if ($this->filters) {
-      $filters_conditions = $this->query->createConditionGroup('OR');
+      $filters_conditions = $this->query->createConditionGroup('AND');
       foreach ($this->filters as $filter) {
         $filter = (int) $filter;
         foreach (['tag_tid', 'thesaurus_tid'] as $field) {