title: Matching an expression including arbitrary lines with regex in Vim
body: <p>In a text file opened with Vim, I'm trying to match the occurrence of two strings, DRIVER_ACTIVITY and DriverGroup, with an arbitrary amount of lines in between:</p>
  
  <pre><code>2013-07-01 05:06:23,801 DRIVER_ACTIVITY
  2013-07-01 05:06:23,804 text
  2013-07-01 05:06:23,804 more text
  2013-07-01 05:06:23,805 DriverGroup
  </code></pre>
  
  <p>using:</p>
  
  <pre><code>/DRIVER_ACTIVITY(.*)DriverGroup/s  
  /DRIVER_ACTIVITY((.|\n|\r)*)DriverGroup  
  /\vDRIVER_ACTIVITY((.|\n|\r)*)DriverGroup  
  /DRIVER_ACTIVITY\[\S\s\]*DriverGroup
  </code></pre>
  
  <p>Nothing matches. How do I match all the lines/new lines?</p>