Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarians, bulgare, bulgareiae, vulgariae
bulgarie » vulgaris, vulgare, bulgareie, vulgarie
bulgarien » vulgarisn, vulgaren, bulgareien, vulgarien
bulgarian » hungarian, bulgareian, vulgarian
bulgaria » bulgareia, vulgaria
bulgar » bulgare, vulgar
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 bulgaria) OR (bulgarie OR (bulgarian OR bulgarien))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or bulgaria) or (bulgarie or (bulgarian or bulgarien))) or (bulgar or bulger))*.