Perhaps you should try some spelling variations:
yuan chang » yuan cheng, huang chang, han chang
fang yuan » wang yuhan, wang yan, meng yuan
chang won » chang soon, chang ann, chang min
das clan » das bilan, das land, das cern
yan clan » yan guan, yan yuan
won hong » hong hong, kong hong, wang hong
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 clan) or (yan clan)) fang yuan chang won hong il ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: twinn ((das clan) OR (yan clan)) fang yuan chang won hong il ;*.