Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgareiae, vulgariae, bulgeriae
bulgarien » bulgarian, bulgareien, vulgarien, bulgerien
bulgareiae » bulgarian, bulgarie, bulgaricae, bulgareeiae, vulgareiae, bulgereiae
bulgarica » bulgarisch, bulgarian, bulgarie, bulgareica, vulgarica, bulgerica
bulgaria » bulgareia, vulgaria, bulgeria
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 bulgaria) OR bulgarien) OR bulgareiae) OR bulgarica) OR (bulgar OR bulges)).
• Adding a wildcard symbol may retrieve word variants: (((((bulgariae or bulgaria) or bulgarien) or bulgareiae) or bulgarica) or (bulgar or bulges))*.