Perhaps you should try some spelling variations:
chang soon » chang won, chin soon, chang gordon
zhang ming » zhang xin
khan sher » han shen, khan syed
than she » than one, than we, can she
cho soon » chor boon, choi woon, chew soon
wan yan » wang yan, nan yan, wai yan
yan yan » yan yuan, nan yan, yang yang
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: wan yan yan ((khan sher) OR (than she)) ((((chang soon) or (cho soon))) or (zhang ming)) hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan yan ((khan sher) OR (than she)) ((((chang soon) OR (cho soon))) OR (zhang ming)) hong yu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan yan ((khan sher) OR (than she)) ((((chang soon) or (cho soon))) or (zhang ming)) hong yu ;".
• Adding a wildcard symbol may retrieve word variants: wan yan yan ((khan sher) OR (than she)) ((((chang soon) or (cho soon))) or (zhang ming)) hong yu ;*.