Perhaps you should try some spelling variations:
vulgariae » bulgariae, vulgarise, bulgaricae
bulgarica » bulgaria, bulgarian, bulgarien, bulgareica, vulgarica, bulgerica
bulgarisch » bulgarische, bulgarischen, bulgareisch, vulgarisch, bulgerisch
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: ((vulgariae OR (hungarian OR (bulgarica OR bulgarisch))) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((vulgariae or (hungarian or (bulgarica or bulgarisch))) or (bulgar or bulge))*.