Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian
bulgarie » bulgarien, bulgaria, bulgarian
bulgarienns » bulgariennns, bulgarianns, bulgariannns, bulgariens, bulgarien, bulgarians
bulgerian » bulgarian, bulgarians, bulgaria, bulgeian, bulgesian
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 (bulgarienns OR bulgerian))) OR (bulger OR vulgar)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgarie or (bulgarienns or bulgerian))) or (bulger or vulgar))*.