The search in the mendix appstore is very strict to the order of words or spaces and because of that searching certain terms result in nothing where you would expect it to return something.
Like if you type in Deeplink you wont get the deep link module result.
Same for if you look for import csv you wont find the Csv Services module.
Also – in Mendix Studio Pro 8.5.0 the search is case sensitive, so at the moment searching for “tree table” does not find the “Tree Table” widget.