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