Perhaps you should try some spelling variations:
bulgariaiae » bulgaricae, bulgariae, bulgariia, bulgareiaiae, vulgariaiae, bulgarieiaiae
bulgariaisch » bulgarisch, bulgarische, bulgarians, bulgareiaisch, vulgariaisch, bulgarieiaisch
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
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: ((bulgariaiae OR (bulgaria OR bulgariaisch)) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariaiae or (bulgaria or bulgariaisch)) or (bulgar or bulger))*.