Perhaps you should try some spelling variations:
vulgariae » bulgariae, vulgarise, bulgaricae
bulgareians » bulgarian, bulgariens, bulgarean, bulgareeians, vulgareians, bulgarieeians
bulgarians » bulgarian, bulgariens, bulgarien, bulgareians, vulgarians, bulgarieians
bulgarisch » bulgarische, bulgarischen, bulgareisch, vulgarisch, bulgarieisch
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
bulger » bulge, 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 ((bulgaria OR bulgareians) OR (bulgarians OR bulgarisch))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((vulgariae or ((bulgaria or bulgareians) or (bulgarians or bulgarisch))) or (bulgar or bulger))*.