Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie
vulgarise » vulgarisee, vulgarises, vulgaris
bulgare » bulgarie, bulgarien, vulgares
vulgare » vulgar, vulgaris, vulgarly
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: (((bulgariae OR vulgarise) OR bulgaria) OR ((bulgare OR vulgare) OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae or vulgarise) or bulgaria) or ((bulgare OR vulgare) or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or vulgarise) or bulgaria) or ((bulgare OR vulgare) or bulger))*.