magento-test/app/code/Magento/AdvancedSearch/etc/adminhtml/events.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="catalogsearch_query_save_after">
        <observer name="magento_advancedsearch_recommendations"
                  instance="Magento\AdvancedSearch\Model\Recommendations\SaveSearchQueryRelationsObserver"
                 />
    </event>
</config>