title: Am I using the right elasticsearch query?
body: <p>Using the <a href="https://github.com/elasticsearch/elasticsearch-rails" rel="nofollow">elastsearch-rails</a> gem, currently I have:</p>
  
  <pre><code>response = Employee.search(
        size: 20, 
        query: {
              multi_match: { 
                    "query" =&gt; search_terms,
                    "type" =&gt; "cross_fields",
                    "fields" =&gt; ["first_name^3", "last_name^3", "full_name^4", "email", "job_description^5", "job_title^5"]
              }
          }
      )
  </code></pre>
  
  <p>What I notice is that by doing the multi-match / cross_fields search, if I search for a term that appears only once in an Employee database column (e.g., "John" would only appear in first_name, not job_description or job_title), then I get no results back.  If a term, (say a job title like "lawyer" appears in more than 1 field such as job_description and job_title), I get results back.  Why is this?  This seems counter-intuitive.</p>