Perhaps you should try some spelling variations:
"medioevo romanis et orientale" » "medioevo romans et orientale", "medioevo romaines et orientale", "medioevo romani ed orientale"
"medioevo romains et orientale" » "medioevo domains et orientale", "medioevo romain et orientale", "medioevo romaine et orientale"

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: (("medioevo romanis et orientale") OR ("medioevo romains et orientale")).
• Removing quotes may allow a broader search: (( medioevo romanis et orientale ) or ( medioevo romains et orientale )).
• Adding a wildcard symbol may retrieve word variants: (("medioevo romanis et orientale") or ("medioevo romains et orientale"))*.