Perhaps you should try some spelling variations:
bulgariaiae » bulgaricae, bulgariae, bulgariia, bulgareiaiae, vulgariaiae, bulgariaiaiae
bulgarien » bulgarian, bulgaria, bulgareien, vulgarien, bulgariaien
bulgareian » bulgarian, bulgarean, bulgaria, bulgareeian, vulgareian, bulgariaeian
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: ((bulgariaiae OR (bulgarien OR (bulgareian OR bulgareian))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariaiae or (bulgarien or (bulgareian or bulgareian))) or (bulgar or bulger))*.