Perhaps you should try some spelling variations:
gene yang » gene bank
hua gene » human gene, a gene, hua ren
yang jin » yang jie, yang jun, ying jin
yan tan » yan clan, yan guan, yan wang
tan tan » tas tan, tin tan, tang tang
jin won » ji won, jin song
won sau » wong sau, wong sam, 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 tan) OR (tan tan)) hua gene yang jin won sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yan tan) OR (tan tan)) hua gene yang jin won sau ;*".