Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarie, bulgarien, vulgariae, bulgeriae, bulgarieiae
bulgarian » hungarian, vulgarian, bulgerian, bulgarieian
bulgarians » hungarians, bulgariens, bulgarien, vulgarians, bulgerians, bulgarieians
vulgarische » bulgarische, bulgarischen, bulgarischer
bulgaria » vulgaria, bulgeria, bulgarieia
bulgar » vulgar, bulger, bulgarie
bulgare » vulgare, bulgere, bulgariee, bulgarie, bulgarien, vulgares
vulgare » vulgar, vulgaris, vulgarly

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 (vulgarische OR (bulgarians OR bulgaria))) OR ((bulgar OR (bulgare OR vulgare)) OR bulge)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae OR bulgarian) or (vulgarische or (bulgarians or bulgaria))) or ((bulgar or (bulgare or vulgare)) or bulge))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae OR bulgarian) or (vulgarische or (bulgarians or bulgaria))) or ((bulgar or (bulgare or vulgare)) or bulge))*.