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