Perhaps you should try some spelling variations:
bulgare » bulgarie, vulgare, bulgaria, bulgere, bulgariae
bulgarien » bulgarian, bulgaria, vulgarien, bulgerien, bulgariaien
vulgarien » bulgariens, vulgarisee, vulgarises
bilgere » bilger, bilgeri, billigere
bulgar » vulgar, bulger, bulgaria

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