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