PDFse: Search for PDF Files on Google
Here is another Google-powered PDF search engine where you can search web for ebooks, document templates, public papers, reports… etc, and easily download them on to your computer. Basically, it’s a simpme search tool for searching PDF files with Google.

Features:
- Search for PDF files and ebooks.
- Download as many files as you like.
- No sign-up needed.
- Similar websites: PDFgeni, PDF and Ebook Search Engine and Data-Sheet.
Check out PDFse @ www.pfdse.com




This is simply a wrapper around the Google search results API, or just their website. Try a search on pdfse.com, then try the same search on Google (while not logged in with a Google Account) with “filetype:pdf” appended. They will match exactly, and Google gives more context.
Everytime typing filetype:pdf is not convenient. It is better and time saving to use http://www.pdfdig.com website. It also has auto complete feature which makes your search faster.
I think google provides fully the same functionality, doesn’t it?