title: FB Graph Api - search in group feed
body: <p>I have a closed FB group and I can get post of it via FB Graph API</p>
  
  <pre><code>$postResult = $this-&gt;facebook-&gt;api("/GROUP_ID/feed", "GET",);
  </code></pre>
  
  <p>But I wanna find post with some "search string" now. I tried</p>
  
  <pre><code>$postResult = $this-&gt;facebook-&gt;api("/GROUP_ID/feed", "GET", array('query' =&gt; "SEARCH_STRING"));
  </code></pre>
  
  <p>and</p>
  
  <pre><code>$postResult = $this-&gt;facebook-&gt;api("/GROUP_ID/search", "GET", array('query' =&gt; "SEARCH_STRING"));
  </code></pre>
  
  <p>but it still not work. Is there some way to search in group posts?</p>