Explorer - search inside Office files

I know it's about Office files and hence would belong in the Office section but the question is for searches which you can run in Windows Explorer. If you look for text that is located inside Office files, I found that Windows Explorer can't find these files. I know I can find inside 1 Office document, but this is for searches inside a lot of files, in a folder structure. It's not necessarily Office files, it could be others as well. How do you do that ?

I use Nirsoft SearchMyFiles for searching the content of Office & other files on my Windows 10 & Windows 11 computers.
See
My latest SearchMyFiles ditties - posts #11, 13 - TenForums
SearchMyFiles can search inside pst files - my post #8 - ElevenForum


Denis