Looking for filemanager app thatsupports intext search for the files stored inside it

[hellom]

Hi,
I understand reading various posts that it's not possible for a file browser to do a full in-text search like windows explorers for all the files stored in the ipad as iOS uses stupid sandboxing that prohibits this.
So somebody pls tell me a file manager app that supports full intext Search for the doc/pdf/excel/files and folders stored inside the same app itself.Need it very badly.

Thanks.