It would be great if search results popped up as you’re typing your query. Sometimes when I come across a word I don’t know I’m not sure if I’ve added it already, I like to use search before. As there can be variant spellings it would be a lot easier for results to show as you’re typing.
Bonus: there could be a plus button next to the search box (right now it disappears when you’re typing), pressing it would go to the add screen with the first field populated with what you typed