Searching for the basic keyword is often "noisy"—you get a lot of false positives or junk files. To get results, seasoned researchers use Google Dorks . These are advanced search operators that filter out the fluff. Better Search Strings (Dorks):

In Apache, add Options -Indexes to your .htaccess file. In Nginx, set autoindex off; .

Use grep on Linux to find any .txt files containing passwords:

[EMAILS]