Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarie, bulgarians, bulgareiae, vulgariae, bulgeriae
bulgarian » hungarian, bulgareian, vulgarian, bulgerian
vulgarie » vulgarise, vulgaris, vulgare
vulgareiae » vulgarise
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 vulgarie) OR vulgareiae) OR bulgaria) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: (((((bulgariae or bulgarian) or vulgarie) or vulgareiae) or bulgaria) or (bulgar or bulge))*.