Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian
bulgariaeian » bulgaricaeian, bulgariaian, bulgarianian, bulgarian, bulgarien, bulgarean
bulgarie » bulgarien, bulgaria, bulgarian
bulgarica » bulgaria, bulgarisch, bulgarian
bulgare » vulgare, bulgarien, bulgaria
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 (bulgarie OR (bulgariaeian OR bulgarica))) OR (bulgare OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgarie or (bulgariaeian or bulgarica))) or (bulgare or bulger))*.