title: How to build tsquery with alternative in postgres full text search
body: <p>I have configured full text search on some tables in postgres DB. When I try to build tsquery with more than 1 word I get words in tsquery with &amp; (AND) as delimiter. In effect I can't find results where is only one of words what I asked.</p>
  <p>Example:</p>
  <pre><code>| ID | Name    | Description         | Rank |
  |----|---------|---------------------|------|
  | 1  |Somethink|This is very strange | 0.2  |
  | 2  |Other    |This is strange a bit| 0    |
  </code></pre>
  <p>When I ask for &quot;very strange&quot; my tsquery looks like that <code>'very' &amp; 'strange'</code>
  , and ranks (ts_rank_cd) for that tsquery is more than 0 only for ID == 1, for ID == 2 is 0.</p>
  <p>My goal is to achieve rank &gt; 0 for 2nd sentence. How to achieve this?</p>