Perhaps you should try some spelling variations:
bulgaricae » bulgarica, bulgarische, bulgaria, bulgareicae, vulgaricae, bulgericae
bulgariia » bulgaria, bulgarica, bulgarian, bulgareiia, vulgariia, bulgeriia
bulgar » bulgare, vulgar, bulger
bulges » bulge
bulgere » bulgare, bulger, burgere
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 bulgariia) OR ((bulgar OR bulges) OR (bulgere OR bilgere))).
• Adding a wildcard symbol may retrieve word variants: ((bulgaricae or bulgariia) or ((bulgar or bulges) or (bulgere or bilgere)))*.