Perhaps you should try some spelling variations:
chang won » chang soon, chang ann, chang min
han shen » khan sher, can she, han en
than she » khan sher, than one, than we
won wong » hon kwong, john wong, kwok wong
wong yue » wang yue, hong yu
yan dan » dan dana, yan clan, yan guan
wang » wing, 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 yan dan ((han shen) or (than she)) chang won wong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan dan ((han shen) OR (than she)) chang won wong yue ;*.