Perhaps you should try some spelling variations:
vulgarise » vulgarisee, vulgarises, vulgaris
bulgaricae » bulgarica, bulgaria, bulgarie, bulgareicae, vulgaricae, bulgericae
bulgarian » bulgaria, hungarian, bulgareian, vulgarian, bulgerian
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgerische
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: ((vulgarise OR (bulgaricae OR (bulgarian OR bulgarische))) OR (bulgar OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((vulgarise or (bulgaricae or (bulgarian or bulgarische))) or (bulgar or bulge))*.