Regarding suggestions, I would start by explaining what you are trying to do, if you intend anyone to use it.

A search engine is not something easy to do. Doing it with privacy in mind as a free service would be something close to unheard of.
Do you have web scrapers to build you own database ? Do you use another search engine and work as a proxy for what you call privacy ?

Then, maybe, I will click on that link...