Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, bulgariaiae, bulgarieiae
bulgarica » bulgaria, bulgarisch, bulgarian, bulgareica, bulgariaica, bulgarieica
bulgar » bulgare, bulgaria, 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: ((bulgariae OR bulgarica) OR ((bulgar OR (vulgar OR vulgar)) OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or bulgarica) or ((bulgar or (vulgar or vulgar)) or bulger))*.