Perhaps you should try some spelling variations:
hua gene » human gene, a gene, hua ren
yang jie » yang jin, yang jui, yang yi
wong sau » wong sam, wong siu, wong shiu
nan yan » nan ya, wang yan, qian yan
yan tan » tan tan, yan clan, yan guan
tan hua » tuan hua, wang hua, tan chia
yang xi » yang yi, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: nan yan tan hua gene ((((yang xi) or (yang di))) or (yang jie)) wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nan yan tan hua gene ((((yang xi) OR (yang di))) OR (yang jie)) wong sau ;*.