diff --git a/web/modules/custom/materio_sapi/src/Controller/Base.php b/web/modules/custom/materio_sapi/src/Controller/Base.php
index a2483020..4de3e5ae 100644
--- a/web/modules/custom/materio_sapi/src/Controller/Base.php
+++ b/web/modules/custom/materio_sapi/src/Controller/Base.php
@@ -88,7 +88,7 @@ class Base extends ControllerBase {
 
     // filter the search
     if ($this->filters) {
-      $filters_conditions = $this->query->createConditionGroup('AND');
+      $filters_conditions = $this->query->createConditionGroup('OR');
       foreach ($this->filters as $filter) {
         $filter = (int) $filter;
         foreach (['tag_tid', 'thesaurus_tid'] as $field) {