title: Elasticsearch & Elasticpress search by math_phrase with & inside query
body: <p>I have problem with my queries when I'm using &quot; or ' - then I expect match_phrase, but I don't know how I can retrieve posts when I'm using match_phrase with &amp;
  For example I'm using <code>Something &amp; Something</code> as phrase, and when I'm didn't using ' and &quot; I can see posts with <code>Something &amp; Something</code> but there I'm using multi_match.</p>
  <p>Something what I've tried:</p>
  <pre><code>{
  &quot;from&quot;: 0,
  &quot;size&quot;: 10,
  &quot;sort&quot;: {
      &quot;post_date&quot;: {
          &quot;order&quot;: &quot;desc&quot;
      }
  },
  &quot;query&quot;: {
      &quot;function_score&quot;: {
          &quot;query&quot;: {
              &quot;bool&quot;: {
                  &quot;must&quot;: [
                      {
                          &quot;match_phrase&quot;: {
                              &quot;query&quot;: &quot;Something &amp; Something&quot;
                          }
                      }
                  ]
              }
          },
          &quot;exp&quot;: {
              &quot;post_date_gmt&quot;: {
                  &quot;scale&quot;: &quot;270d&quot;,
                  &quot;decay&quot;: 0.5,
                  &quot;offset&quot;: &quot;90d&quot;
              }
          },
          &quot;score_mode&quot;: &quot;avg&quot;,
          &quot;boost_mode&quot;: &quot;sum&quot;
      }
  },
  &quot;post_filter&quot;: {
      &quot;bool&quot;: {
          &quot;must&quot;: [
              {
                  &quot;terms&quot;: {
                      &quot;post_type.raw&quot;: [
                          &quot;post&quot;
                      ]
                  }
              },
              {
                  &quot;terms&quot;: {
                      &quot;post_status&quot;: [
                          &quot;publish&quot;
                      ]
                  }
              }
          ]
      }
  }
  }
  </code></pre>
  <p>But this doesn't return any post, and returning hits total 0. Anyone have any idea, or suggestions, what I'm doing wrong ?</p>