Perhaps you should try some spelling variations:
chang yang » chen yang, wang yang, zhang yan
yang hong » wang hong, yang hongli, quang hong
das cern » das ferne, das clan
yan clan » das clan, yan guan, yan yuan
nan yuan » yan yuan, fang yuan, nan ya
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 clan)) ((nan yuan) or (nan yan)) chang yang hong il ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: twinn ((das cern) OR (yan clan)) ((nan yuan) OR (nan yan)) chang yang hong il ;.
• Adding a wildcard symbol may retrieve word variants: twinn ((das cern) or (yan clan)) ((nan yuan) or (nan yan)) chang yang hong il ;*.