This has probably been requested many times. When viewing the flashcards within a category, it would be great to have a quick search/filter option (by characters and pinyin), instead of having to execute a full blown search.
Not at the moment - requires searching the linked dictionary entries, which would be rather slow - but it's on our to-do list.
Closest approximation now would be to do a search in the search box prefixed by !# - that will force a full-text search and put dictionary entries that are in flashcards on top.
Thanks! It occurred to me to ask because I've been using an app, Flashcards Deluxe 4.0 for study of Sanskrit, and I found it very easy to search through my flashcards using the English definitions. I look forward to the big update of the flashcard module.