Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarie, bulgarians, bulgareiae, vulgariae, bulgeriae
bulgarian » hungarian, bulgareian, vulgarian, bulgerian
bulgarische » ungarische, bulgareische, vulgarische, bulgerische
bulgarischen » ungarischen, bulgarien, ungarische, bulgareischen, vulgarischen, bulgerischen
vulgaria » vulgaris, vulgari, vulvaria
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 bulgarischen) OR (bulgaria OR vulgaria))) OR (bulgar OR bulge)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae or bulgarian) or ((bulgarische OR bulgarischen) or (bulgaria or vulgaria))) or (bulgar or bulge))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or bulgarian) or ((bulgarische OR bulgarischen) or (bulgaria or vulgaria))) or (bulgar or bulge))*.