Perhaps you should try some spelling variations:
yuan wang » yan wang, yuan kang, yuan chang
gene long » gene clone, gene one
wong shiu » wong siu, cong shu, song shin
yan yuan » yan guan, fang yuan, nan yan
hua gene » human gene, a gene, hua ren
ron paul » von paul, robyn paul, robin paul
haul » hall, hail, raul

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 haul ((wong shiu) or (ron paul)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yan yuan wang hua gene long haul ((wong shiu) OR (ron paul)) ;.
• Adding a wildcard symbol may retrieve word variants: yan yuan wang hua gene long haul ((wong shiu) or (ron paul)) ;*.