Perhaps you should try some spelling variations:
bulgariae » bulgaria, bulgarian, bulgarien, bulgareiae, vulgariae, bulgariaiae
bulgarians » bulgarian, bulgariens, bulgaria, bulgareians, vulgarians, bulgariaians
bulgaricae » bulgarica, bulgarische, bulgaria, bulgareicae, vulgaricae, bulgariaicae
bulgar » bulgare, vulgar, bulgaria
bulgarie » bulgareie, vulgarie, bulgariaie, bulgarien, bulgaria, bulgarian
vulgare » vulgar, vulgaris, vulgarly
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 bulgarians) OR bulgaricae) OR ((bulgar OR (bulgarie OR vulgare)) OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae OR bulgarians) or bulgaricae) or ((bulgar or (bulgarie or vulgare)) or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae OR bulgarians) or bulgaricae) or ((bulgar or (bulgarie or vulgare)) or bulger))*.