Perhaps you should try some spelling variations:
bulgeriae » bulgariae, bulgaricae, bulgarian
bulgar » vulgar, bulger, bulgarie
bulgare » vulgare, bulgere, bulgariee, bulgarie, vulgares
bulgaria » vulgaria, bulgeria, bulgarieia
bulgarien » vulgarien, bulgerien, bulgarieien, bulgarian

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