Perhaps you should try some spelling variations:
bulgariae » bulgarian, bulgarie, bulgarians, bulgareiae, vulgariae, bulgarieiae
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgarieische
bulgaricae » bulgarica, bulgarian, bulgarie, bulgareicae, vulgaricae, bulgarieicae
bulgariaica » bulgarica, bulgariia, bulgareiaica, vulgariaica, bulgarieiaica
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
bulger » bulge, 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: ((bulgariae OR ((bulgarische OR bulgaria) OR (bulgaricae OR bulgariaica))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or ((bulgarische or bulgaria) or (bulgaricae or bulgariaica))) or (bulgar or bulger))*.