Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, vulgariae, bulgeriae
bulgerian » bulgarian, bulgarians, bulgaria
vulgarians » bulgarians, vulgaris, bulgarian
bulgarica » bulgaria, bulgarisch, bulgarian, bulgareica, vulgarica, bulgerica
bulgar » bulgare, vulgar, bulger
bulges » bulge

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 ((bulgerian OR vulgarians) OR bulgarica)) OR (bulgar OR bulges)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or ((bulgerian or vulgarians) or bulgarica)) or (bulgar or bulges))*.