Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yan » yang yang, wang yan, yang fan
hua gene » human gene, a gene, hua ren
wong sam » wong sau, wong lai, kong sar
yan hua » tan hua, ya hua, wang hua
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 hua gene ((yan ji) or (yang di)) ((won sau) or (wong sam)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yan hua gene ((yan ji) OR (yang di)) ((won sau) OR (wong sam)) ;.
• Adding a wildcard symbol may retrieve word variants: wang yang yan hua gene ((yan ji) or (yang di)) ((won sau) or (wong sam)) ;*.