Perhaps you should try some spelling variations:
hua gene » human gene, a gene, hua ren
yang jie » yang jin, yang di, yang jui
wong sam » wong sau, wong lai, kong sar
wan yan » wang yan, nan yan, wai yan
yan yan » yan yuan, nan yan, yang yang
yan hua » tan hua, ya hua, wang hua
yang ji » yang jui, yang jin, yang di
won sau » wong sau, wong siu

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

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