Perhaps you should try some spelling variations:
bulgare » bulgarie, vulgare, vulgares, bulgere, bulgariee
bulgarien » bulgarian, vulgarien, bulgerien, bulgarieien
bilgere » bilger, bilgeri, billigere
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 bilgere) OR (bulgar OR bulgaria)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgare or bulgarien) or bilgere) or (bulgar OR bulgaria))".
• Adding a wildcard symbol may retrieve word variants: (((bulgare or bulgarien) or bilgere) or (bulgar OR bulgaria))*.