Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarie, bulgarians, bulgareiae, vulgariae, bulgeriae
bulgarian » hungarian, bulgareian, vulgarian, bulgerian
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgerische
vulgaria » vulgari, vulvaria, vulgaridad
vulgaris » vulgar
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger

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