Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgareiae, vulgariae, bulgeriae
vulgariae » vulgarise, bulgaricae, vulgaridad
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger

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: (((bulgariae OR vulgariae) OR bulgaria) OR bulgar).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae OR vulgariae) or bulgaria) or bulgar)".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae OR vulgariae) or bulgaria) or bulgar)*.