Using Query Builder
Query Builder is a graphical tool for advanced search.
Here’s an 8-step tutorial to get you started.
Build a query to find PDF files that mention passwords
From the main menu select Search
Click Advanced Search
Make sure that the Common category is open
If it isn’t open, click the + sign next to Common
This shows you the fields in that category that you can filter
Drag the Body field onto the canvas
In the search box, type ‘password’
Don’t include the single quotes
From the Common category, drag the File Type field onto the canvas
In the search box, type ‘pdf’
Click Search to run the query
Your output should look something like this: