Perhaps you should try some spelling variations:
gene yang » gene bank
yan clan » das clan, yan guan, yan yuan
hua gene » human gene, a gene, hua ren
wong siu » wong shiu, kong siu, wong sau
yan tan » tan tan, yan guan, yan wang
yang ji » yang jui, yang jie, yang jin
won sau » wong sau, wong sam

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 (yan clan)) hua gene yang ji ((won sau) or (wong siu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan ((yan tan) OR (yan clan)) hua gene yang ji ((won sau) OR (wong siu)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yan tan) OR (yan clan)) hua gene yang ji ((won sau) or (wong siu)) ;*".