Perhaps you should try some spelling variations:
bulgaricae » bulgarische, bulgarian, bulgarie, bulgariane, bulgariene, bulgareicae, vulgaricae, bulgericae
bulgarica » bulgarisch, bulgarian, bulgarien, bulgareica, vulgarica, bulgerica
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger
bulgese » 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: (((bulgaricae OR bulgarica) OR bulgaria) OR ((bulgar OR bulge) OR bulgese)).
• Adding a wildcard symbol may retrieve word variants: (((bulgaricae or bulgarica) or bulgaria) or ((bulgar or bulge) or bulgese))*.