title: Elasticsreach boosting query by field value
body: <p>I want to search in documents which some words in one filed are more important than others,</p>
  
  <p>For example:</p>
  
  <blockquote>
    <p><strong>US</strong> intelligence believes <strong>North Korea</strong> is making more <strong>nuclear bomb</strong> fuel despite talks</p>
  </blockquote>
  
  <p>Is there a way to Elasticsearch understand it?
  Some thing like this:</p>
  
  <pre><code>US^5 intelligence believes (North Korea)^10 is making more (nuclear bomb)^8 fuel despite talks
  </code></pre>