How to find specific file format (pdf, ppt, doc, docx, xls, zip) in Google?
You can filter the web pages with the given file type.
In search box, type as "filetype:" followed by the file extension.
For eg: filetype:ods
To search the particular file extension in a website, type the name of the site, ":", followed by the file type.
For example, easycalculation:ods.
You can also search various file formats like pdf, ppt, doc, docx, xls, zip using Google.