Perhaps you should try some spelling variations:
yuan chen » yuan cheng, yun chen, sudan chen
wang yang » wang yan, wang liang, wang yanling
gong gang » hong gang, gong qiang, gongs gong
zhong zhi » hong ghi, zhong tai
zhang zhi » wang zhi, zhang wei, zhang dai
chen hao » cheng han
hao ruiz » han rui
ruiz yan » ruiz juan
yan wang » yuan wang, yang yang, qian wang

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: yuan chen hao ruiz yan wang yang ((gong gang) OR (((zhong zhi) OR (zhang zhi)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yuan chen hao ruiz yan wang yang ((gong gang) or (((zhong zhi) OR (zhang zhi)))) ;~".
• Adding a wildcard symbol may retrieve word variants: yuan chen hao ruiz yan wang yang ((gong gang) or (((zhong zhi) OR (zhang zhi)))) ;*.