Perhaps you should try some spelling variations:
yuan wang » yan wang, yuan kang, yuan chang
gene long » gene clone, gene one
yan yuan » yan guan, fang yuan, nan yan
hua gene » human gene, a gene, hua ren
long han » long chain, long thanh, long haul
wong sau » wong sam, wong siu, wong shiu
ron paul » von paul, robyn paul, robin paul

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

• Performing a fuzzy search may retrieve terms with similar spellings: yan yuan wang hua gene long han ((wong sau) or (ron paul)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yan yuan wang hua gene long han ((wong sau) OR (ron paul)) ;.
• Adding a wildcard symbol may retrieve word variants: yan yuan wang hua gene long han ((wong sau) or (ron paul)) ;*.