Perhaps you should try some spelling variations:
gene yang » gene bank
yang yang » wang yang, wang yan
hua gene » human gene, a gene, hua ren
yang jin » yang jie, yang jun, ying jin
jin wong » jin song, john wong, jin ying
wong sau » wong sam, wong siu, wong shiu
yan yan » yan yuan, nan yan, wang yan

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) or (yang yang)) hua gene yang jin wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan ((yan yan) OR (yang yang)) hua gene yang jin wong sau ;*.