Perhaps you should try some spelling variations:
gene yang » gene bank
zhang yan » zhang fan, zhang jian
hua gene » human gene, a gene, hua ren
yang jun » yang jui, pang jun, yang jin
wong sam » wong sau, wong lai, von sam
yan hua » tan hua, ya hua, wang hua
sar » sara, star, saur

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((zhang yan) or (wang yan)) yan hua gene yang jun ((wong sam) or (kong sar)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((zhang yan) OR (wang yan)) yan hua gene yang jun ((wong sam) OR (kong sar)) ;*.