Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, vulgariae, bulgariaiae
bulgariaeian » bulgaricaeian, bulgariaian, bulgarianian, bulgarian, bulgarean, bulgariia, bulgareiaeian, vulgariaeian, bulgariaiaeian
bulgarien » bulgarian, bulgaria, bulgareien, vulgarien, bulgariaien
bulgarica » bulgaria, bulgarisch, bulgarian, bulgareica, vulgarica, bulgariaica
bulgar » bulgare, vulgar, bulgaria
bulger » bulge, bulges

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 (bulgarien OR (bulgariaeian OR bulgarica))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgarien or (bulgariaeian or bulgarica))) or (bulgar or bulger))*.