You can use google for that. If you want for example to search in "Seekers of Perl Wisdom" you can try this:

site:www.perlmonks.org "has asked for the wisdom of the Perl Monks" se
+arch_term
[download]

or if you use the firefox needlesearch plugin or similar: you can use this url:

http://www.google.com/search?hl=de&q=site%3Awww.perlmonks.org+%22has+a
+sked+for+the+wisdom+of+the+Perl+Monks%22+needlesearch&btn&meta=
[download]

It's _a lot_ faster too. And you can view the results in Goolge's cache too - taking a litte load off perlmonks. :)