Perhaps you should try some spelling variations:
bulgarie » bulgarien, vulgaris, vulgare, bulgareie, bulgerie
bulgariens » bulgarienns, vulgarisns, vulgarens, bulgarien, bulgareiens, bulgeriens
bulgerian » bulgarians, eulerian, bulgarien
bulgarian » hungarian, bulgareian, bulgerian
bulgaria » bulgareia, bulgeria
bulgar » bulgare, 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: ((bulgaria OR (bulgarie OR (bulgariens OR (bulgerian OR bulgarian)))) OR (bulgar OR vulgar)).
• Adding a wildcard symbol may retrieve word variants: ((bulgaria or (bulgarie or (bulgariens or (bulgerian or bulgarian)))) or (bulgar or vulgar))*.