Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie, bulgeriae, bulgariaiae, bulgarieiae
bulgarian » bulgaria, hungarian, bulgerian, bulgariaian, bulgarieian
bulgar » bulger, bulgaria, bulgarie
bulgare » bulgere, bulgariae, bulgariee, bulgarie, vulgare, bulgarien
bulgerian » bulgarians, bulgaria, eulerian

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 bulgerian) OR vulgar) OR bulgare)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae OR bulgarian) or (((bulgar or bulgerian) or vulgar) or bulgare))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae OR bulgarian) or (((bulgar or bulgerian) or vulgar) or bulgare))*.