Perhaps you should try some spelling variations:
zhang ming » zhang xin
yang yang » wang yang, wang yan
chang won » chang soon, chang ann, chang min
gong hui » tong hui, tong shui, wang hui
yan yan » yan yuan, wang yan, qian yan
nan yan » nan ya, wang yan, qian yan
hua han » hua ban, hua chen, hua zhao
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 yan) or (nan yan))) or (yang yang)) hua han ((chang won) or (zhang ming)) gong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((((yan yan) OR (nan yan))) OR (yang yang)) hua han ((chang won) OR (zhang ming)) gong hui ;.
• Adding a wildcard symbol may retrieve word variants: wang ((((yan yan) or (nan yan))) or (yang yang)) hua han ((chang won) or (zhang ming)) gong hui ;*.