Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgeriae, bulgarieiae
bulgarica » bulgarisch, bulgarian, bulgarien, bulgerica, bulgarieica
bulgaria » bulgeria, bulgarieia
bulgar » bulger, bulgarie
bulgare » bulgere, bulgariee, bulgarie, vulgare, bulgarien

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 (bulgarica OR bulgaria)) OR (((bulgar OR vulgar) OR bulgare) OR bulge))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or (bulgarica or bulgaria)) or (((bulgar OR vulgar) or bulgare) or bulge))*".