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
tong shui » cong shu, gong hui
tong hui » wang hui
yan yan » yan yuan, nan yan, wang 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 (yang yang)) hua han ((chang won) or (chang min)) ((tong shui) OR (tong hui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan yan) OR (yang yang)) hua han ((chang won) OR (chang min)) ((tong shui) OR (tong hui)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yan) or (yang yang)) hua han ((chang won) or (chang min)) ((tong shui) OR (tong hui)) ;".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yan) or (yang yang)) hua han ((chang won) or (chang min)) ((tong shui) OR (tong hui)) ;*.