Perhaps you should try some spelling variations:
"motet" » "lotet", "monet", "moet", "mottet", "moret", "modet"
"motets" » "lotets", "monets", "moets", "mottets", "morets", "modets"
"moret" » "moreto", "mores", "morel"
"morets" » "moretos", "moress", "morels", "moretus", "forets", "moreto"
"mote" » "motte", "more", "mode"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((("motet" OR "moret") OR "mote") OR ("motets" OR "morets")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((\"motet\" OR \"moret\") or \"mote\") or (\"motets\" or \"morets\"))".
• Removing quotes may allow a broader search: ((( motet OR moret ) or mote ) or ( motets or morets )).
• Adding a wildcard symbol may retrieve word variants: ((("motet" OR "moret") or "mote") or ("motets" or "morets"))*.