Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgareiae, vulgariae, bulgeriae
ungarische » ungarischen
vulgarian » bulgarian, bulgarians, vulgaridad
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger
bulgarien » bulgareien, vulgarien, bulgerien, bulgarian

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