File search engines are rare, it is possible to find the file/document that you need using advanced search operators in Google, but even so search results might not be exactly what you are looking for.
Recently we've stumbled on FileDiva a unique file meta search engine that craw all popular file sharing websites. The list is huge – more than 50 file sharing websites are included in the search engines, including some of the most popular like 4shared.com, Extabit.com, Turbobit.net, Mediafire.com, Rapidgator.net, Netload.in, 4shared.com, Extabit.com, Uploaded.to, Rapidgator.net, Netload.in, Turbobit.net, Mediafire.com, etc...
It is full-fledged file search engine and some of the most notable features are:
Search through 50+ file sharing websites
Sorting by relevance and date
Sorting by size
sorting by file format
Quite unique features and probably one of a kind project which easily can find the file that you are looking for. Are you looking for a file or document, why not visit FileDiva?