Perhaps you should try some spelling variations:
vulgariae » bulgariae, vulgarise, bulgaricae
bulgarica » bulgaria, bulgarian, bulgarien, bulgareica, vulgarica, bulgariaica
bulgarisch » bulgarische, bulgarischen, bulgareisch, vulgarisch, bulgariaisch
bulgar » bulgare, vulgar, bulgaria
bulger » bulges

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 (bulger OR bulge))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vulgariae or (hungarian or (bulgarica or bulgarisch))) or (bulgar or (bulger OR bulge)))".
• Adding a wildcard symbol may retrieve word variants: ((vulgariae or (hungarian or (bulgarica or bulgarisch))) or (bulgar or (bulger OR bulge)))*.