Friend,
I found a person with the same doubt as yours. Take a look at this answer here: link
If you can not, you could simply download your database.sql and search the archive for the term you want. This would be the fastest way, in my opinion
Thiago Luiz is right, I'll paste the answer I found:
In phpMyAdmin to 'Search' feature is available:
Select particular database not table.
Click 'Search' tab
Enter the search term you want
Select the tables you want to search in
phpMyAdmin screen shot:
The'Search'featureisalsoavailableinMySQLWorkbench:
DatabaseMenu>SearchTableDataSelectdatabaseandtablesyouwanttosearch(itwillsearchinselectedtablesonly)InsearchyoucanusewildChars.MySQLWorkbenchscreenshot: