Perhaps you should try some spelling variations:
bulgeriae » bulgariae, bulgaricae, bulgarian
bulgaria » vulgaria, bulgeria, bulgarieia
bulgar » vulgar, bulger, bulgarie
bulgare » vulgare, bulgere, bulgariee, bulgarie, vulgares
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: ((bulgaria OR bulgeriae) OR (bulgar OR (bulgare OR bulgarien))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgaria or bulgeriae) or (bulgar or (bulgare OR bulgarien)))".
• Adding a wildcard symbol may retrieve word variants: ((bulgaria or bulgeriae) or (bulgar or (bulgare OR bulgarien)))*.