Perhaps you should try some spelling variations:
vulgariae » bulgariae, vulgarise, bulgaricae, vulgarie
bulgaren » bulgarien, bulgarean, bulgare, bulgareen, vulgaren, bulgeren
bulgareian » bulgarian, bulgarean, bulgaria, bulgareeian, vulgareian, bulgereian
vulgaria » bulgaria, vulgaris, vulgari
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 bulgaren) OR (bulgareian OR vulgaria)) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: (((vulgariae or bulgaren) or (bulgareian or vulgaria)) or (bulgar or bulge))*.