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