Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
han china » hang china, than china, can china
chang min » zhang ming, chang mae, chan ming
qian yan » qian jun, qian yi
han chin » hang china, than china, can china
min tong » min hong, xin tong, minh cong
tong hui » wang hui

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((qian yan) OR (yang yang)) ((han chin) OR (han china)) chang min tong hui ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((qian yan) or (yang yang)) ((han chin) or (han china)) chang min tong hui ;*.