title: Scoring in Match phrase and Match query not as expected
body: <p>I am little confused how scoring is done in matchphrase and match query by seeing my results</p>
  
  <p>For Match Phrase
  I have query like below</p>
  
  <pre><code>sd.Query(q =&gt;    
   q.MatchPhrase(m =&gt; m  
   .Field(p =&gt; p.title)  
   .Query("Test Article in Credit")    
    ));
  </code></pre>
  
  <p>the reults obtained are as below<br>
  a. document with "Test Article in Credit - Consumer" score 12.64<br>
  b. document with "Test Article with Credit -X"       score 12.64<br>
  c. document with "Test Article in Credit - XYZ"      score 10.92<br>
  d. document with "Test Article in Credit"            score 10.22<br>
  e. document with "Test Article in Credit -Z"         score 09.40  </p>
  
  <p>first two are from different index and last three from different index</p>
  
  <p>According to me the fourth one should have high  score and second should have lowest.
  I am using standard Analyzer</p>
  
  <p>Similarly my match query does same<br>
  document with title"Test" is having high score than 
  document with title"Test Article in Credit"</p>
  
  <p>I know scoring happens for more relevant articles based on
  frequency of term appearing , length of text.</p>
  
  <p>How can i restructure my query to give documents in right order?</p>