Perhaps you should try some spelling variations:
bulgaricae » bulgarica, bulgarische, bulgarian, vulgaricae, bulgericae, bulgarieicae
bulgaria » vulgaria, bulgeria, bulgarieia
bulgar » vulgar, bulger, bulgarie
bulgare » vulgare, bulgere, bulgariee, bulgarie, bulgarien
bulges » bulge
bilgere » bilger, bilgeri, billigere

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