title: Search column but exclude list of words in another column
body: <p>I have a function that looks at keywords in multiple columns, and lists all unique versions alphabetically in one list. This is the function I have so far:</p>
  
  <pre><code>=unique(sort(substitute(query({A2:A;B2:B}, "where Col1 &lt;&gt;''"),"""","")))
  </code></pre>
  
  <p>I also have a list of keywords in Column C that I do not want to be listed with the function above. What needs to be added to the above to do this?</p>