Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, vulgariae, bulgarieiae
vulgareiae » vulgarise
bulgaria » vulgaria, bulgarieia
bulgar » vulgar, bulgarie
bulgare » vulgare, bulgariee, bulgarie, bulgarien
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 vulgareiae) OR bulgaria) OR ((bulgar OR bulgare) OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae or vulgareiae) or bulgaria) or ((bulgar OR bulgare) or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or vulgareiae) or bulgaria) or ((bulgar OR bulgare) or bulger))*.