Perhaps you should try some spelling variations:
bulgarian » bulgaria, hungarian, bulgareian, vulgarian, bulgariaian
vulgari » vulgaris, vulgar, vulgare
bulgariaisch » bulgarisch, bulgarische, bulgarians, bulgareiaisch, vulgariaisch, bulgariaiaisch
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: ((bulgarian OR (vulgari OR bulgariaisch)) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgarian or (vulgari or bulgariaisch)) or (bulgar or bulger))*.