Perhaps you should try some spelling variations:
bulgare » bulgarie, vulgares, vulgare, bulgere, bulgariee
bulgarien » bulgarian, vulgarien, bulgerien, bulgarieien
vulgare » vulgar, vulgaris, vulgarly
bulgar » vulgar, bulger, bulgarie
bulgaria » vulgaria, bulgeria, bulgarieia

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