Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
qian wang » yiqian wang, qian rong, qian yan
yang yuan » fang yuan, yan yuan, yang yun
chang han » chang ha, zhang han, chang chuan
cheng han » chen hao
dean » dewan, jean, den

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 ((yang yang) OR (yang dean)) qian wang yang yuan ((chang han) OR (cheng han)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang yang) or (yang dean)) qian wang yang yuan ((chang han) OR (cheng han)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yang yang) or (yang dean)) qian wang yang yuan ((chang han) OR (cheng han)) ;*.