Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yang yan » wang yan, yang fan, yang yao
hua gene » human gene, a gene, hua ren
yang jui » yang judy, yang di, yang xi
wong sam » wong sau, wong lai, kong sar
won sau » wong sau, wong siu
yan ji » yan jiu, ban ji, pan ji

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yang yan) OR (yang yang)) hua gene ((yan ji) or (yang jui)) ((won sau) or (wong sam)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yang yan) OR (yang yang)) hua gene ((yan ji) OR (yang jui)) ((won sau) OR (wong sam)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang yan) OR (yang yang)) hua gene ((yan ji) or (yang jui)) ((won sau) or (wong sam)) ;".
• Adding a wildcard symbol may retrieve word variants: wang ((yang yan) OR (yang yang)) hua gene ((yan ji) or (yang jui)) ((won sau) or (wong sam)) ;*.