Are you getting no results at all, or a lot of results that you're not interested in?
Try here:
https://www.google.com/cse?cx=016660200577587308545%3Aesf40ml9aag&ie=UTF-8&q=&sa=Google+search#gsc.tab=0or using the regular forum search, but try to be more specific if you're getting too many results (complete the "by user:", "Options", "Message age:" fields, and choose the boards where you think it's most likely the post was made), or less specific if you're getting no results at all.
You can also try using search operators, quotation marks generally speed up the search for me.
It's also possible that it the poster deleted his own post.