Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie, bulgareiae, vulgariae, bulgeriae
bulgarien » bulgaria, bulgareien, vulgarien, bulgerien
bulgarian » bulgaria, hungarian, bulgareian, vulgarian, bulgerian
bulgarica » bulgaria, bulgarisch, bulgarie, bulgareica, vulgarica, bulgerica
bulgar » bulgare, vulgar, bulger

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 (bulgarien OR (bulgarian OR bulgarica))) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgarien or (bulgarian or bulgarica))) or (bulgar or bulge))*.