Search by typing
You do not have to click the search field. With Type to search on, typing in the collection opens search and shows matches as you go, including notes and addresses.
Hiding the search field does not turn search off. Turn Type to search off in Preferences if letters should not start a search. Exclude search, under More on a bookmark, leaves that item out of results.
Full-text search across the library is part of PRO and ULTRA. The free plan searches titles.