Perhaps you should try some spelling variations:
"vassall" » "vassals", "hassall"
"vassalls" » "vassalss", "hassalls", "vassallos", "vassals", "vassallo"
"vassars" » "vassals", "vassar", "nassars"
"vassill" » "vassil", "vassili", "vassily"

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: (("vassall" OR ("vassars" OR "vassalls")) OR "vassill").
• Removing quotes may allow a broader search: (( vassall or ( vassars or vassalls )) or vassill ).
• Adding a wildcard symbol may retrieve word variants: (("vassall" or ("vassars" or "vassalls")) or "vassill")*.