searchConfig.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<search_config> <!-- Search configuration for Simple/Configurable products -->
    <max_amount_of_words_description>200</max_amount_of_words_description>
    <max_amount_of_words_short_description>20</max_amount_of_words_short_description>
    <min_amount_of_words_description>20</min_amount_of_words_description>
    <min_amount_of_words_short_description>5</min_amount_of_words_short_description>
</search_config>