Perhaps you should try some spelling variations:
bulgariia » bulgarica, bulgaricae, bulgarian, bulgareiia, vulgariia, bulgeriia
vulgaricae » bulgaricae, bulgarica, bulgariae
bulgarien » bulgarian, bulgareien, vulgarien, bulgerien
bulgaria » bulgareia, vulgaria, bulgeria
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: ((bulgariia OR (vulgaricae OR (bulgaria OR bulgarien))) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariia or (vulgaricae or (bulgaria or bulgarien))) or (bulgar or bulge))*.