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