Perhaps you should try some spelling variations:
yan tuan » yan guan, yan yuan, anh tuan
tuan hua » tan hua, tuan vu, yuan hui
hua gene » human gene, a gene, hua ren
yang jui » yang judy, yang yi
yang jie » yang jin, yang yi, yang jun
wong siu » wong shiu, kong siu, wong sau
wan yan » wang yan, nan yan, wai yan
yang xi » yang yi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan tuan hua gene ((((((yang xi) OR (yang jui))) OR (yang di))) OR (yang jie)) wong siu ;~.
• Adding a wildcard symbol may retrieve word variants: wan yan tuan hua gene ((((((yang xi) or (yang jui))) or (yang di))) or (yang jie)) wong siu ;*.