Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, vulgariae, bulgariaiae
vulgarian » bulgarian, bulgarians, vulgaridad
vulgaricae » bulgaricae, vulgaridad, vulgarise
bulgarica » bulgaria, bulgarisch, bulgarian, bulgareica, vulgarica, bulgariaica
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 vulgarian) OR (vulgaricae OR bulgarica)) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or vulgarian) or (vulgaricae or bulgarica)) or (bulgar or bulger))*.