Perhaps you should try some spelling variations:
bulgaricae » bulgarica, bulgarische, bulgarian, vulgaricae, bulgericae, bulgarieicae
bulgeriae » bulgariae, bulgarian, bulgarie
bulgar » vulgar, bulger, bulgarie
bulgaria » vulgaria, bulgeria, bulgarieia
bulgare » vulgare, bulgere, bulgariee, bulgarie, bulgarien

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 bulgeriae) OR ((bulgar OR bulgaria) OR bulgare)).
• Adding a wildcard symbol may retrieve word variants: ((bulgaricae or bulgeriae) or ((bulgar or bulgaria) or bulgare))*.