Search all collections

Does any one know how to make SAB search in all the collections?


Please guide regarding this matter.
I want to make app that can search any word in all the collection, instead of the collection that is opened.
Is there any way through which I enter a single word or phrase and app searches in all the collection???

I don’t believe it can.

Then it should be changed to feature request.

Better to start a new post as a feature request.