One of the pinical of serch sites:
http://www.pandia.com/powersearch/
Google (tradmark :-) is where you start
and pandia is where one ends
as they say:
"It is not that we consider ourselves a competitor
of Google, Yahoo! and others — we wouldn’t write so
much about them if that was the case. We are more
like a supplement, giving you additional tools that
might be of use in your quest for information
and enlightenment."