Perhaps you should try some spelling variations:
bulgareiae » bulgariae, bulgaria, bulgarian, bulgareeiae, vulgareiae, bulgereiae
bulgarien » bulgarian, bulgaria, bulgareien, vulgarien, bulgerien
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgerische
vulgaria » bulgaria, vulgaris, vulgari
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: (((bulgareiae OR bulgarien) OR (bulgarische OR vulgaria)) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: (((bulgareiae or bulgarien) or (bulgarische or vulgaria)) or (bulgar or bulge))*.