I'm on IOS not Android so if you are not on an apple device, not sure.
If you are on an apple device using the new version after updating to IOS 9, Im' not sure either as I'm holding back a month before doing that
But if you are on the original JRemote app they both work before the recent updata. The difference is the search on the left is a general search. The search on the top is filtered by the view you have open (likein standard view) If you don't have any views open or if the views do not include what you are searching for, nothing will show ... by design. Click on your "Studio" or "Live" View to test
I really wish they had a general search in standard view, like in JRemote .. just saying :p