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