Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie
bulgarian » bulgaria, hungarian
bulgariia » bulgaria, bulgaricae, bulgarien
bulgarica » bulgaria, bulgarisch, bulgarien
bulgare » bulgarie, vulgare, bulgarien
bulger » bulge, bulges

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 (bulgarian OR (bulgariia OR bulgarica))) OR (bulgare OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgarian or (bulgariia or bulgarica))) or (bulgare or bulger))*.