Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarie, bulgarians, bulgareiae, vulgariae, bulgarieiae
bulgarian » hungarian, bulgareian, vulgarian, bulgarieian
bulgar » bulgare, vulgar, bulgarie
bulgaria » bulgareia, vulgaria, bulgarieia
bulgarien » bulgareien, vulgarien, bulgarieien
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 bulgarian) OR (((bulgar OR bulgaria) OR bulgarien) OR bulger))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or bulgarian) or (((bulgar OR bulgaria) or bulgarien) or bulger))*".