Perhaps you should try some spelling variations:
"vassal" » "vassals", "vassall", "vassil"
"vassili" » "vassil", "vassiliki", "vassilios"
"vassilis" » "vassils", "vassilikis", "vassilioss"
"vassart" » "vassar", "massart", "assart"

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 ("vassili" OR "vassilis")) OR "vassart").
• Removing quotes may allow a broader search: (( vassal or ( vassili or vassilis )) or vassart ).
• Adding a wildcard symbol may retrieve word variants: (("vassal" or ("vassili" or "vassilis")) or "vassart")*.