Perhaps you should try some spelling variations:
"vassal" » "vassall", "vassar"
"vassallo" » "vassalllo", "vassarlo", "vassall", "hassall"
"vassals" » "vassalls", "vassars", "vassilis"
"vassallos" » "vassalllos", "vassarlos", "vassalls", "hassalls", "vassilios", "vassall"
"vassil" » "vasil", "vassilis"

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: ((("vassal" OR "vassallo") OR "vassil") OR ("vassals" OR "vassallos"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((\"vassal\" OR \"vassallo\") or \"vassil\") or (\"vassals\" or \"vassallos\"))*".
• Removing quotes may allow a broader search: ((( vassal OR vassallo ) or vassil ) or ( vassals or vassallos ))*.