Perhaps you should try some spelling variations:
vulgari » vulgaris, vulgar, bulgaria
vulgare » vulgar, vulgaris, vulgarly
bulgeriae » bulgariae, bulgaricae, bulgaria
bulgar » bulgare, vulgar, bulger
bulgere » bulgare, bulger, bilgere

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: (((vulgari OR vulgare) OR bulgeriae) OR (bulgar OR bulgere)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((vulgari OR vulgare) or bulgeriae) or (bulgar or bulgere))".
• Adding a wildcard symbol may retrieve word variants: (((vulgari OR vulgare) or bulgeriae) or (bulgar or bulgere))*.