phpnuke internal search rewrite

I need someone familiar with the phpnuke cms (or php in general)to rewrite, readjust the internal search engine. Here's exactly what I need fixed: [login to view URL];d_op=search&query=content%20management%20system searching for "content management system" plenty of results. and the problem: [login to view URL];d_op=search&query=content%20system searching for "content system" 0 results. We have a problem here! Basically I need some partial results istead of 0. My site has a huge database and someone searching for "michael dangerous" will get 0 results even when michael jackson - dangerous exists The code is open source so please have a look. I don't know if its a simple fix or something major thank you