Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
chang won » chang soon, chang ann, chang you
chang min » zhang ming, chang mae, chan ming
yan yuan » yan guan, fang yuan, nan yan
gong hui » tong hui, tong shui, wang hui
yan yan » nan yan, 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 (yan yuan))) or (yang yang)) hua han ((chang won) or (chang min)) gong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((((yan yan) OR (yan yuan))) OR (yang yang)) hua han ((chang won) OR (chang min)) gong hui ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((yan yan) OR (yan yuan))) or (yang yang)) hua han ((chang won) or (chang min)) gong hui ;".
• Adding a wildcard symbol may retrieve word variants: wang ((((yan yan) OR (yan yuan))) or (yang yang)) hua han ((chang won) or (chang min)) gong hui ;*.