title: CloudSearch filtered query works in test dashboard but not on search endpoint
body: <p>I need to filter my search by the host.
  I was able to do this in the CloudSearch Dashboard under &quot;Run a Test Search&quot; (See picture)</p>
  <p><a href="https://i.stack.imgur.com/Kz8Ro.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Kz8Ro.png" alt="enter image description here" /></a></p>
  <p>Awesome! That was easy. Except not awesome. I'm going crazy trying to get that to work with my actual search endpoint.</p>
  <p>This I would assume should give me the same results as the dashboard test query, but it isn't filtering them at all.</p>
  <pre><code>https://search.endpoint/?q.parser=structured&amp;q='hello%20test'&amp;fq=host:'example.com'
  </code></pre>
  <p>I've tried using the Structured Query language, Lucene, and DisMax for query parsing, but I can't get it working on any of them.</p>
  <pre><code>https://search.endpoint/?q.parser=lucene&amp;q=hello%20test&amp;fq=host:'example.com'
  </code></pre>
  <pre><code>https://search.endpoint/?q.parser=dismax&amp;q=hello%20test&amp;fq=host:'example.com'
  </code></pre>
  <p>What am I doing wrong?</p>