Perhaps you should try some spelling variations:
vulgariae » bulgariae, vulgarise, bulgaricae
vulgarische » bulgarische, bulgarischen, bulgarischer
vulgarian » bulgarian, bulgarians, vulgaridad
bulger » bulges
bulgare » vulgare, bulgarien, vulgares
bulgarie » bulgarien, bulgarian, vulgaris

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: ((vulgariae OR (vulgarische OR (vulgarian OR bulgaria))) OR ((bulger OR (bulgare OR bulgarie)) OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((vulgariae or (vulgarische or (vulgarian or bulgaria))) or ((bulger or (bulgare or bulgarie)) or bulge))*.