Perhaps you should try some spelling variations:
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
dong sind » dong sin, dong bin, dong ping
chen wang » chen yang, chen rong, chen ping
wang qin » wang lin, wang qiao, wang jing
wang hui » wang hua, wang zhi, wang wei
yu chen » yu cheng, yi chen, yulu chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((yang yang) or (wang yang))) or (dong sind)) ya yu chen wang qin ((tong hui) OR (wang hui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((yang yang) OR (wang yang))) OR (dong sind)) ya yu chen wang qin ((tong hui) OR (wang hui)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((yang yang) or (wang yang))) or (dong sind)) ya yu chen wang qin ((tong hui) OR (wang hui)) ;*".