This plugin gives you a way of searching the database from within TXP Admin.
It’s a bit like smd_where_used … that looks in more places, but without the “lint” functionality.
Simply go to the “Search DB” tab (under Extensions) & do your searches. There’re some filter options there too.
Anything in the database that can be considered content or data is included in the search – see the plugin help for a full list. It can also peek in plugin tables – a couple are already included (let me know if there are others you’d like to rummage through).