Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgareiae, vulgariae, bulgarieiae
vulgariae » vulgarise, bulgaricae, vulgaridad
bulgarien » bulgarian, bulgareien, vulgarien, bulgarieien
vulgarian » bulgarian, bulgarians, vulgaridad
bulgarica » bulgarisch, bulgarian, bulgarie, bulgareica, vulgarica, bulgarieica
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
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 vulgariae) OR (bulgarien OR (vulgarian OR (bulgarica OR bulgaria)))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or vulgariae) or (bulgarien or (vulgarian or (bulgarica or bulgaria)))) or (bulgar or bulger))*.