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 di, yang xi
yang jie » yang jin, yang di, yang xi
wong sau » wong sam, wong siu, wong shiu
wan yan » wang yan, nan yan, wai yan

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 tuan hua gene ((yang jui) or (yang jie)) wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan tuan hua gene ((yang jui) OR (yang jie)) wong sau ;*.