Perhaps you should try some spelling variations:
bulgaars » bulgare
vulgare » vulgar, vulgaris, vulgarly
bulgarien » bulgarian, bulgariann, vulgarisn, bulgareien, vulgarien, bulgerien
bulgarie » bulgarian, vulgaris, bulgareie, vulgarie, bulgerie
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger

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 ((vulgare OR bulgarien) OR (bulgaria OR bulgarie))) OR bulgar).
• Adding a wildcard symbol may retrieve word variants: ((bulgaars or ((vulgare or bulgarien) or (bulgaria or bulgarie))) or bulgar)*.