Looks like I found the solution for you. Please use following code snippet
add_filter( 'aws_search_results_all', 'my_aws_search_results_all', 10, 2 );
function my_aws_search_results_all( $result_array, $s ) {
global $wpdb;
$search_array = array_unique( explode( ' ', $s ) );
$search_array = AWS_Helpers::filter_stopwords( $search_array );
$search_terms = array();
$relevance_array = array();
$terms_number = 10;
$search_query = '';
$relevance_query = '0';
if ( is_array( $search_array ) && ! empty( $search_array ) ) {
foreach ( $search_array as $search_term ) {
$search_term = trim( $search_term );
if ( $search_term ) {
$like = '%' . $wpdb->esc_like( $search_term ) . '%';
$search_term_len = strlen( $search_term );
$relevance = 40 + 2 * $search_term_len;
$relevance_desc = 10 + 2 * $search_term_len;
$search_terms[] = $wpdb->prepare( '( post_title LIKE %s )', $like);
$search_terms[] = $wpdb->prepare( '( post_content LIKE %s )', $like);
$relevance_array[] = $wpdb->prepare( "( case when ( post_title LIKE %s ) then {$relevance} else 0 end )", $like );
$relevance_array[] = $wpdb->prepare( "( case when ( post_content LIKE %s ) then {$relevance_desc} else 0 end )", $like );
}
}
}
if ( $search_terms ) {
$search_query = sprintf( ' AND ( %s )', implode( ' OR ', $search_terms ) );
}
if ( $relevance_array ) {
$relevance_query = sprintf( ' (SUM( %s )) ', implode( ' + ', $relevance_array ) );
}
$sql = "
SELECT
ID, post_title, post_content, post_type, {$relevance_query} as relevance
FROM
$wpdb->posts
WHERE 1 = 1
AND post_status = 'publish'
AND post_type IN ( 'page', 'epkb_post_type_1' )
GROUP BY ID
HAVING relevance > 0
ORDER BY relevance DESC, post_date DESC
LIMIT 0, {$terms_number}";
$sql = trim( preg_replace( '/\s+/', ' ', $sql ) );
$search_results = $wpdb->get_results( $sql );
if ( ! empty( $search_results ) && !is_wp_error( $search_results ) ) {
foreach ( $search_results as $result ) {
$image_src = '';
$post_thumbnail_id = get_post_thumbnail_id( $result->ID );
if ( $post_thumbnail_id ) {
$thumb_url_array = wp_get_attachment_image_src( $post_thumbnail_id );
$image_src = $thumb_url_array ? $thumb_url_array[0] : '';
}
if ( $result->post_type ) {
$new_result = array(
'name' => $result->post_title,
'link' => get_permalink( $result->ID ),
'image' => $image_src,
'id' => $result->ID
);
$result_array['tax'][$result->post_type][] = $new_result;
}
}
}
return $result_array;
}
You need to add it somewhere outside the plugins folder. For example, inside functions.php file of your theme or use some plugin for adding code snippets.
Also after adding this code you will need to go to the plugin settings page and click the ‘Clear cache’ button.