Search by Filetype
By adding filetype:ppt to our search we’re finding only PowerPoint documents. You could search for both PPT and PDF files by searching filetype:ppt OR filetype:pdf but that’s going to get you content you can’t edit.
Keep in mind you can also focus your searches around other file types including- Excel (XLS), PDF, Word (DOC), and Google Earth (KMZ or KML).
Search by Site
By adding site:edu to our search we’re searching only sites in the EDU domain. You could search for both edu and gov sites by searching site:edu OR site:gov.
This search pattern can search across all domains of a certain type or you can use it to search a specific site like site:vcu.edu. That’s handy when a site doesn’t have a decent search option built in.