title: Mongo Search query by word starting letters
body: <p>I am worked on my current project with MONGO, I need a query if i am search a letter need to search every word</p>
  <p>ex: I have 3 topics named in my db as below</p>
  <blockquote>
  <p><strong>chemistry, chemical, organic chemistry</strong></p>
  </blockquote>
  <p>i tried with query like below</p>
  <pre><code>db.topics.find({name: { '$regex': '^che', '$options': 'i' }}, {})
  </code></pre>
  <p>but i am getting results of <strong>chemistry and chemical</strong> only</p>
  <p>but my requirement is if i search with <strong>che</strong> then that letter need to check firtst letters of every word and  results comes with chemistry, chemical and <strong>organic chemistry</strong> also (because in organic chemistry have word starts with <strong>che</strong>mistry</p>