Perhaps you should try some spelling variations:
bulgarien » bulgaria, bulgareien, vulgarien, bulgerien
bulgerien » bulgariens, bulgarie, algerien
bulgareia » bulgaria, bulgariia, bulgarie, bulgareeia, vulgareia, bulgereia
bulgar » bulgare, vulgar, bulger
bulgarian » bulgareian, vulgarian, bulgerian, bulgaria, hungarian
bilgere » bilger, bilgeri, billigere

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