Perhaps you should try some spelling variations:
bulgarica » bulgarian, bulgarien, bulgarie, bulgareica, vulgarica, bulgarieica
bulgarisch » bulgarische, bulgarischen, bulgareisch, vulgarisch, bulgarieisch
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
vulgaris » vulgar
bulger » 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: (((bulgarica OR bulgarisch) OR bulgaria) OR (((bulgar OR vulgaris) OR bulge) OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgarica OR bulgarisch) or bulgaria) or (((bulgar or vulgaris) or bulge) or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((bulgarica OR bulgarisch) or bulgaria) or (((bulgar or vulgaris) or bulge) or bulger))*.