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

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: ((bulgeriae OR bulgeriae) OR (bulgar OR (bulgare OR vulgare)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgeriae or bulgeriae) or (bulgar or (bulgare OR vulgare)))*".