Perhaps you should try some spelling variations:
bulgariaiae » bulgaricae, bulgariae, bulgariia, bulgareiaiae, vulgariaiae, bulgeriaiae
bulgarica » bulgarisch, bulgarian, bulgarie, bulgareica, vulgarica, bulgerica
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: ((bulgariaiae OR (bulgaria OR (bulgarica OR bulgarien))) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariaiae or (bulgaria or (bulgarica or bulgarien))) or (bulgar or bulge))*.