Perhaps you should try some spelling variations:
khan sher » han shen, khan syed
chang won » chang soon, chang ann, chang min
than she » than one, than we, can she
won wong » hon kwong, john wong, kwok wong
wong yue » wang yue, hong yu
yan dan » dan dana, yan clan, yan guan
wang » wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wang OR wing) yan dan ((khan sher) or (than she)) chang won wong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wing) yan dan ((khan sher) OR (than she)) chang won wong yue ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang OR wing) yan dan ((khan sher) or (than she)) chang won wong yue ;*".