Perhaps you should try some spelling variations:
das bilan » des bilan, des bilans, das bild
yan zhang » yuan chang, bin zhang, han chang
zhang won » chang won, zhang hong, zhang rong
yan yuan » yan guan, fang yuan, yan clan
won hong » hong hong, kong hong, wang hong
nan yan » nan ya, wang yan, qian yan
hong il » jong il, hyoung il, honig ii

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: twinn ((das bilan) or (yan yuan)) nan yan zhang won hong il ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: twinn ((das bilan) OR (yan yuan)) nan yan zhang won hong il ;.
• Adding a wildcard symbol may retrieve word variants: twinn ((das bilan) or (yan yuan)) nan yan zhang won hong il ;*.