With the copy from Windows Word into a form passed into a backend script, there might be a combination like "\r\n".
So, multiple \n\n might not be valid in the search. If this is the case, then trying looking for a pair combination of \r\n\r\n ..
so a sequenced pair of \r\n\r\n would require a replacement for a HTML line break \n \n.
see: http://www.perlmonks.org/?node_id=549385