PHPMyAdmin search not finding text? [on hold]

I want to search and replace our old domain, example.net, to example.com in our MySQL database.

When I try to search in the database using PHPMyAdmin, It returns 0 matching records, but when I downloaded the database to my local computer and opened it using Notepad++, I found more than 1000 matches searching for the old domain (example.net).

How is it possible?