title: Custom query in posts_search
body: <p>How can I use this query as my custom search query?</p>
  
  <pre><code>add_filter('posts_search', 'my_search_is_perfect', 20, 2);
  function my_search_is_perfect($search, $wp_query) 
  {
     $sWord = 'Zukunft haus';
  
     return "
         SELECT *, 
                MATCH(post_title) AGAINST('$sWord' IN BOOLEAN MODE) AS Score 
          FROM `wp_posts` 
         INNER JOIN wp_term_relationships ON wp_term_relationships.object_id = ID
               AND wp_term_relationships.term_taxonomy_id = 1
         WHERE MATCH( post_title) AGAINST ('$sWord' IN BOOLEAN MODE) 
           AND `post_status` = 'publish'
           AND `post_type` = 'post'
         ORDER BY score DESC
    "; 
  }
  </code></pre>
  
  <p>The query is correct (I checked this in phpMyAdmin) but in WordPress I get the message, no results.</p>