Perhaps you should try some spelling variations:
wang cong » wang yong, wang hong, wang yang
chia rene » chia wen, china ren
china who » china why, china what, china won
yang zhao » yang yizhao, feng zhao
cong van » congo can, duong van, cong sun
yang yao » yang yang, wang yan, yang yi
hong yu » wong yue

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 cong van ((chia rene) OR (china who)) ((yang zhao) OR (yang yao)) hong yu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang cong van ((chia rene) or (china who)) ((yang zhao) OR (yang yao)) hong yu ;~".
• Adding a wildcard symbol may retrieve word variants: wang cong van ((chia rene) or (china who)) ((yang zhao) OR (yang yao)) hong yu ;*.