Perhaps you should try some spelling variations:
zaman khan » rahman khan
sher chang » shen chang, sheri chaney
chang won » chang soon, chang ann, chang min
dan khan » dan phan, yar khan
won wong » hon kwong, john wong, kwok wong
wong yue » wang yue, hong yu
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 khan) or (((zayn khan) OR (zaman khan)))) sher chang won wong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ((dan khan) OR (((zayn khan) OR (zaman khan)))) sher chang won wong yue ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((dan khan) or (((zayn khan) OR (zaman khan)))) sher chang won wong yue ;*".