Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgeriae, bulgarieiae
bulgar » bulger, bulgarie
bulgaria » bulgeria, bulgarieia
bulgare » bulgere, bulgariee, bulgarie, vulgare, bulgarien
bulgerian » bulgarian, bulgarians, eulerian

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