// redirect any search to Google with full filetype operators + bypass tricks
filetype:pdf β only return PDF files(filetype:pdf OR filetype:docx) β multiple types at oncesite:.edu β limit to .edu domains (university files)intitle:"keyword" β keyword must appear in the page titleinurl:download β URL contains the word download (direct file links)-login -paywall β exclude pages requiring login or payment"index of" /files β find open directory listings with downloadable files