Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarie, bulgarians, vulgariae, bulgeriae, bulgarieiae
bulgarian » hungarian, vulgarian, bulgerian, bulgarieian
bulgarische » bulgarischen, ungarische, vulgarische, bulgerische, bulgarieische
bulgaria » vulgaria, bulgeria, bulgarieia
bulgar » vulgar, bulger, bulgarie
bulgare » vulgare, bulgere, bulgariee, bulgarie, bulgarien

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