Ho! Ho! Ho! I wish I knew! :-)
But if you start using InfoAxe today, you should be able to search and find whatever you want to look for from your past web or search histories one day. InfoAxe is a brand new internet startup that wants to be the number one search engine for your Web Memory and the feature that allows users to dig into their past web or search histories is Pivot. Take note that this is only possible after you have downloaded, installed and use InfoAxe for some period of time.
Sorry to say that Pivot is the only thing that makes InfoAxe different than the rest but feel free to watch the following InfoAxe demo video to see what the hell this is all about in the first place. :-)
Recommended Reading Link:
Infoaxe Records Your Browsing Sessions, Lets You Search Your Web History