Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, vulgariae, bulgeriae
bulgareia » bulgaria, bulgariia, bulgarian, bulgareeia, vulgareia, bulgereia
vulgaria » bulgaria, vulgaris, vulgari
bulgarien » bulgarian, bulgaria, bulgareien, vulgarien, bulgerien
bulgar » bulgare, vulgar, bulger

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 (bulgareia OR vulgaria)) OR (bulgariae OR bulgarien)) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or (bulgareia or vulgaria)) or (bulgariae or bulgarien)) or (bulgar or bulge))*.