Perhaps you should try some spelling variations:
bulgeriae » bulgariae, bulgaricae, bulgarian
bulgarien » bulgarian, bulgareien, vulgarien, bulgerien
bulgareiae » bulgariae, bulgarian, bulgarie, bulgareeiae, vulgareiae, bulgereiae
vulgaricae » bulgaricae, bulgarica, bulgariae
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger
bulges » bulge

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: ((((bulgeriae OR bulgarien) OR bulgareiae) OR (bulgaria OR vulgaricae)) OR (bulgar OR bulges)).
• Adding a wildcard symbol may retrieve word variants: ((((bulgeriae or bulgarien) or bulgareiae) or (bulgaria or vulgaricae)) or (bulgar or bulges))*.