Perhaps you should try some spelling variations:
"Medioevo romaines et orientale" » "Medioevo romains et orientale", "Medioevo domaines et orientale", "Medioevo humaines et orientale"
"Medioevo romanis et orientale" » "Medioevo romans et orientale", "Medioevo romains et orientale", "Medioevo romani ed orientale"
"medioevo romano et orientale" » "medioevo romano e orientale", "medioevo roman et orientale", "medioevo romano del orientale"

Try widening your search to All Fields.

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 romano et orientale") OR ((("Medioevo romanis et orientale") OR ("Medioevo romaines et orientale")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"medioevo romano et orientale\") or (((\"Medioevo romanis et orientale\") OR (\"Medioevo romaines et orientale\"))))".
• Removing quotes may allow a broader search: (( medioevo romano et orientale ) or ((( Medioevo romanis et orientale ) OR ( Medioevo romaines et orientale )))).
• Adding a wildcard symbol may retrieve word variants: (("medioevo romano et orientale") or ((("Medioevo romanis et orientale") OR ("Medioevo romaines et orientale"))))*.