magento-test/app/code/Magento/AdvancedSearch/etc/adminhtml/system.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:module:Magento_Config:etc/system_file.xsd">
    <system>
        <section id="catalog">
            <group id="search">
                <field id="search_recommendations_enabled" translate="label comment" type="select" sortOrder="80" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Enable Search Recommendations</label>
                    <comment>When you enable this option your site may slow down.</comment>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                </field>
                <field id="search_recommendations_count" translate="label" type="text" sortOrder="81" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Search Recommendations Count</label>
                    <validate>validate-digits</validate>
                    <depends>
                        <field id="search_recommendations_enabled">1</field>
                    </depends>
                </field>
                <field id="search_recommendations_count_results_enabled" translate="label" type="select" sortOrder="82" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Show Results Count for Each Recommendation</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                    <depends>
                        <field id="search_recommendations_enabled">1</field>
                    </depends>
                </field>
                <!--<group id="suggestions">-->
                    <field id="search_suggestion_enabled" translate="label comment" type="select" sortOrder="90" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                        <label>Enable Search Suggestions</label>
                        <comment>When you enable this option your site may slow down.</comment>
                        <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                    </field>
                    <field id="search_suggestion_count" translate="label" type="text" sortOrder="91" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                        <label>Search Suggestions Count</label>
                        <validate>validate-digits validate-zero-or-greater</validate>
                        <depends>
                            <field id="search_suggestion_enabled">1</field>
                        </depends>
                    </field>
                    <field id="search_suggestion_count_results_enabled" translate="label comment" type="select" sortOrder="92" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                        <label>Show Results Count for Each Suggestion</label>
                        <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                        <comment>When you enable this option your site may slow down.</comment>
                        <depends>
                            <field id="search_suggestion_enabled">1</field>
                        </depends>
                    </field>
                <!--</group>-->
            </group>
        </section>
    </system>
</config>