Perhaps you should try some spelling variations:
bulgarica » bulgarian, bulgarien, bulgarie, bulgareica, vulgarica, bulgerica
bulgarisch » bulgarische, bulgarischen, bulgareisch, vulgarisch, bulgerisch
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger
vulgaris » vulgar

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: (((bulgarica OR bulgarisch) OR bulgaria) OR (((bulgar OR vulgaris) OR bulge) OR bulges)).
• Adding a wildcard symbol may retrieve word variants: (((bulgarica or bulgarisch) or bulgaria) or (((bulgar or vulgaris) or bulge) or bulges))*.