title: Grep in R using AND
body: <p>Is there a way to pass two terms to grep for search for? </p>
  
  <p>Imagine I wanted to find items in an object containing both "five" and "six" i.e "five" AND "six" . </p>
  
  <pre><code>grep("five" &amp; "six", object) 
  </code></pre>
  
  <p>This will not work, I know there is notation for OR with |. </p>