Perhaps you should try some spelling variations:
"vassal" » "vassall", "vassil", "vassar"
"vassals" » "vassalls", "vassils", "vassars"
"vassalls" » "vassallls", "vassills", "vassarls", "vassallos", "vassall", "vassallo"
"vassill" » "vassil", "vassall", "vassili"

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 (("vassals" OR "vassilis") OR "vassalls")) OR "vassill").
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"vassal\" or ((\"vassals\" OR \"vassilis\") or \"vassalls\")) or \"vassill\")".
• Removing quotes may allow a broader search: (( vassal or (( vassals OR vassilis ) or vassalls )) or vassill ).
• Adding a wildcard symbol may retrieve word variants: (("vassal" or (("vassals" OR "vassilis") or "vassalls")) or "vassill")*.