How can I concatenate variables to search results title? [closed]

Please try to use following code

add_filter( 'aws_title_search_result', 'my_aws_title_search_result', 10, 3 );

function my_aws_title_search_result( $title, $post_id, $product ) {

    $text1 = get_post_meta( $post_id, '_tyre_size_field', true );
    $text2 = get_post_meta( $post_id, '_load_speed_field', true );
    $text3 = get_post_meta( $post_id, '_tyre_brand_field', true );
    $text4 = get_post_meta( $post_id, '_brand_model_field', true );
    $text5 = get_post_meta( $post_id, '_run_flat_field', true );

    if (stripos( $title, 'TYRE' ) == true ) {
        $title = $text1 . " ". $text2 . " " . $text3 . " " . $text4 . " " . $text5 . " " . $title;
    }

    return $title;

}

Also after this you will probably need to go to plugin settings page and click ‘Clear cache’ button.