If you are looking for documents on the internet , you ‘d rather use specialized search engines which will bring you documents with indicated extensions such as word , pdf , ppt .Here is a compilation of the best document search engines I found online :
1- DocJax
2-Searchdocs
Use this search engine to find documents in the following ‘Documents Sharing Communities’

3-Find a PDF
Search PDF Files Easily and Quickly

4 – PDFfind
Search only PDF files online

5 – Brupt
Document Search Engine based on Google Customized Search.

6- 09h15
Search engine in various languages for documents , pdf , presentations and spreadsheets.

7- TypePDF
Searches through “1045691″ of PDF documents and ebooks found in the world wide web.

8 -FreeBookSearch
This search will find documents on school, college and university websites .

9 – Osun
Searches for doc , pdf and ppt
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10 – PDF Search Engine
Searches for documents with the following extensions : doc , pdf , chm , rft , txt
Please feel free to suggest more links to document search engines .






Dec 16, 2010 @ 13:17:39
Very useful, thank you!
Jan 06, 2011 @ 18:39:45
I was familiar with Scribd and Google Docs but appreciate knowing about these other options. I’m going to try DocStoc and Gazhoo. They look promising.
Apr 25, 2011 @ 08:38:22
RT@MatAbraz: New useful search engine that returns full PDF scientific articles not subject to access fees http://www.freefullpdf.com
May 25, 2011 @ 13:31:31
You might want to take a look into http://searchadocument.com. I have found it to be easy and very helpful.
Aug 09, 2011 @ 01:35:26
Another pdf search engine is http://searchpdffiles.com, thanks for sharing
Apr 23, 2012 @ 08:38:35
Have you tried http://www.socachat.com ? It is phenomenal!!!!
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Feb 15, 2013 @ 17:21:20
your missing this one http://dum.im the largest document search engine, by the way thank’s for sharing.