Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarians, vulgariae, bulgeriae
bulgarie » bulgarien, bulgarian, vulgaris, vulgarie, bulgerie
bulgarica » bulgarisch, bulgarian, bulgarien, vulgarica, bulgerica
bulgaria » vulgaria, bulgeria
bulgar » vulgar, bulger
bulgare » vulgare, bulgere, bulgarien, vulgares

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