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

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