AVON supports some "filtering" and searching by subject terms, which theoretically should provide more accurate search and retrieval than simple keyword searching. In reality, the "subject" terms appear to have not been applied to many of the individual records, so the subject searching and filtering is uneven. Using the "collections" option is more likely to include results that would otherwise be missed.
Filter
At the top of each search or collection screen, AVON will usually display a filter option. The first filter option should allow you to choose videos that match one of the top twenty subject headings in those videos.
Searching
To limit a search to AVON's subject field, type "subject:" (the word subject with the colon) and your subject term. (If your term has more than one word, put it in quotation marks.
subject:theatre
subject:"social work"