Perhaps you should try some spelling variations:
vulgareiae » bulgariae
vulgarise » vulgarisee, vulgarises, vulgaris
bulgaricae » bulgarica, bulgarische, bulgaria, bulgareicae, vulgaricae, bulgericae
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: (((vulgareiae OR vulgarise) OR bulgaricae) OR (bulgar OR bulge))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((vulgareiae OR vulgarise) or bulgaricae) or (bulgar or bulge))*".