Want to ensure privacy when you search? Take a look at Oscobo, which is a new British based search engine. It's another of the 'we don't track you' crew, such as Ixquick, Startpage and DuckDuckgo. It's a fairly straightforward engine, nothing particularly advanced about it, though it does do a nice line in providing tweets that relate to your subject of your search. As well as web search, Oscobo will search video, images and news for you. If you're wondering about the name, let them explain: "Like all the best companies, we’ve taken some creative license with the name. “Scobo” in Latin means “to look into”, “to probe” or “to discover”. The letter “O” in Swedish, means “not” or “non”. So, Oscobo, to us, means “not to probe, not to track”."
I tried a few searches and they all seemed to work perfectly well. There did appear to be some 'adult' filtering going on, but there weren't any details in their 'about us' which told me anything else.
Interesting engine - worth a look, especially because it's a .uk engine for once!