Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, vulgariae, bulgeriae
vulgarie » vulgarise, vulgare, bulgarie
vulgaris » bulgaria, vulgar
bulgar » bulgare, vulgar, bulger
bulgarien » bulgareien, vulgarien, bulgerien, bulgarian, bulgaria
bulgere » bulgare, bulger, bilgere

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 (vulgarie OR vulgaris)) OR (((bulgar OR bulgarien) OR bulgere) OR (bulges OR bulge)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or (vulgarie or vulgaris)) or (((bulgar or bulgarien) or bulgere) or (bulges OR bulge)))*".