You can use Google Dorking for security, and Google Dorking to optimize your SEO using a complete syntax.
site:Returns the website pages.
filetype:
Returns files with the filetype in the URL. Filetype can be doc,ini,txt,sql,etc...
inurl:
Returns files with the string in URL.
intext:
Returns files with the string in the text.
Examples :
intext:add-url & site:add-url.fr & filetype:html & inurl:Add Url :