Thank you for your question.
There are a several ways to use the search inside TWS.
One of them is the 'Find in Files'. You can launch it by the 'Ctrl+Shift+F' hotkey or in a next way: Main Menu -> Edit -> Find and Replace -> Find in Files.
There you have an ability to set 'Result options'. Please expand this section and select the appropriate window where you want to get the result for your search.
This is convenient if you need to get results for several conditions for the search in files.