Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, vulgariae, bulgeriae
bulgar » bulgare, vulgar, bulger
bulgere » bulgare, bulger, bilgere
bulgeriae » bulgaricae, bulgaria, bulgarian

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: (bulgariae OR ((bulgar OR bulgere) OR bulgeriae)).
• Adding a wildcard symbol may retrieve word variants: (bulgariae or ((bulgar or bulgere) or bulgeriae))*.