Perhaps you should try some spelling variations:
chang john » change john, changed john, chang soon
khan syed » ahsan syed, shah syed, khan sher
wang yang » wang yan, wang liang, wang yanling
john wang » john wong
yang fan » zhang fan, yang dean, yang yang
han shen » khan sher, can she, han en
wang yue » wong yue, wang hua, wang yan

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 fan ((han shen) or (khan syed)) chang john wang yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang fan ((han shen) OR (khan syed)) chang john wang yue ;*.