Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, vulgariae, bulgariaiae
vulgaria » bulgaria, vulgaris, vulgari
bulgareieiaisch » bulgareeieiaisch, vulgareieiaisch, bulgariaeieiaisch
bulgar » bulgare, vulgar, bulgaria
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 (vulgaria OR bulgareieiaisch)) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (vulgaria or bulgareieiaisch)) or (bulgar or bulger))*.