Perhaps you should try some spelling variations:
bulgarische » bulgarischen, ungarische, vulgarische, bulgarieische
bulgaria » vulgaria, bulgarieia
bulgar » vulgar, bulgarie
bulgare » vulgare, bulgariee, bulgarie, bulgarien
bulgariee » vulgariee, bulgarieiee, bulgarien, bulgarie, bulgariae
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: ((bulgarische OR bulgaria) OR ((bulgar OR bulger) OR (bulgare OR bulgariee))).
• Adding a wildcard symbol may retrieve word variants: ((bulgarische or bulgaria) or ((bulgar or bulger) or (bulgare or bulgariee)))*.