Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, vulgariae, bulgeriae, bulgarieiae
vulgarische » bulgarischen, bulgarischer, ungarische
bulgarische » bulgarischen, ungarische, vulgarische, bulgerische, bulgarieische
vulgarian » bulgarian, bulgarians, vulgaridad
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 ((vulgarische OR bulgarische) OR (vulgarian OR bulgaria))) OR ((bulgar OR bulgare) OR bulge)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or ((vulgarische OR bulgarische) or (vulgarian or bulgaria))) or ((bulgar or bulgare) or bulge))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or ((vulgarische OR bulgarische) or (vulgarian or bulgaria))) or ((bulgar or bulgare) or bulge))*.