Perhaps you should try some spelling variations:
wang yidan » wang yan
hang china » change china, ghana china, kong china
han china » than china, can china, dan china
chang won » chang soon, chang ann, chang min
yang dan » yang dean, yang fan, wang dan
won hong » hong hong, kong hong, wang hong
hong yu » wong yue

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yang dan) or (wang yidan)) ((han china) OR (hang china)) chang won hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yang dan) OR (wang yidan)) ((han china) OR (hang china)) chang won hong yu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang dan) or (wang yidan)) ((han china) OR (hang china)) chang won hong yu ;*".