Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarie, bulgarians, bulgareiae, vulgariae, bulgeriae
bulgarian » hungarian, bulgareian, vulgarian, bulgerian
bulgerie » bulgarie, bulgarien, algerie
bulgareiae » bulgarie, bulgaricae, bulgarean, bulgareeiae, vulgareiae, bulgereiae
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger

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 bulgerie) OR bulgareiae) OR bulgaria) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: (((((bulgariae or bulgarian) or bulgerie) or bulgareiae) or bulgaria) or (bulgar or bulge))*.