title: Google tag manager trigger not firing when set to URL contains [some text]
body: <p>I am trying to track page view events of certain pages of my site.</p>
  
  <p>The GTM trigger does NOT fire if I set it up as:</p>
  
  <pre><code>PAGE URL / contains / chinese
  </code></pre>
  
  <p>But it works if I set it as: </p>
  
  <pre><code>PAGE URL / equals / www.example.com/booksaboutchinesefood
  </code></pre>
  
  <p>I really want to use the first way (page url / contains).  </p>
  
  <p>Any idea how I can make it work?</p>