Perhaps you should try some spelling variations:
"motet" » "mote", "monet", "moret"
"motets" » "motes", "monets", "morets"
"motte" » "mitte"
"mottes" » "mittes", "mottoes", "mottles", "gottes"
"mottets" » "mittets"
"lotet" » "loten"

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 "motte") OR "more") OR (("motets" OR ("mottes" OR "mottets")) OR "lotet")).
• Removing quotes may allow a broader search: ((( motet or motte ) or more ) or (( motets or ( mottes or mottets )) or lotet )).
• Adding a wildcard symbol may retrieve word variants: ((("motet" or "motte") or "more") or (("motets" or ("mottes" or "mottets")) or "lotet"))*.