Perhaps you should try some spelling variations:
yuan chang » yuan cheng, huang chang, han chang
yan chang » han chang, yan zhang, can change
wang hong » wang yong, wang hyoung, wang lihong
das cern » das ferne, das clan
yan yuan » yan guan, fang yuan, yan clan
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 cern) or (((yan yuan) OR (nan yan)))) nan ((yan chang) or (yuan chang)) wang hong il ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: twinn ((das cern) OR (((yan yuan) OR (nan yan)))) nan ((yan chang) OR (yuan chang)) wang hong il ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "twinn ((das cern) or (((yan yuan) OR (nan yan)))) nan ((yan chang) or (yuan chang)) wang hong il ;".
• Adding a wildcard symbol may retrieve word variants: twinn ((das cern) or (((yan yuan) OR (nan yan)))) nan ((yan chang) or (yuan chang)) wang hong il ;*.