Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarians
bulgarie » bulgarien, bulgaria, vulgare
vulgaris » bulgaria
bulgarian » bulgaria, hungarian
bulgarica » bulgaria, bulgarisch, bulgarien
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 ((bulgarie OR vulgaris) OR (bulgarian OR bulgarica))) OR (vulgar OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or ((bulgarie OR vulgaris) or (bulgarian or bulgarica))) or (vulgar or bulger))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or ((bulgarie OR vulgaris) or (bulgarian or bulgarica))) or (vulgar or bulger))*.