Perhaps you should try some spelling variations:
bulgariae » bulgarian, bulgarie, bulgarians
bulgareiae » bulgarian, bulgarie, bulgarean
bulgaricae » bulgarische, bulgarian, bulgarie, bulgariane, bulgariene
bulgariia » bulgarian, bulgarien, bulgarie
bulgarica » bulgarisch, bulgarian, bulgarien
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 bulgareiae) OR ((bulgaricae OR bulgariia) OR bulgarica)) OR (bulgaria OR bulger)).
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or bulgareiae) or ((bulgaricae or bulgariia) or bulgarica)) or (bulgaria or bulger))*.