Perhaps you should try some spelling variations:
yan ming » yuan ming, wan ming, kian ming
hua gene » human gene, hua ren, hy5 gene
yang jie » yang jin, yang jui, yang xi
wong sam » wong sau, wong lai, kong sar
wong siu » wong shiu, kong siu, wong sau
wan yan » wang yan, nan yan, wai yan
a gene » a genre, a gender, a gentle

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 ming ((hua gene) OR (a gene)) ((yang jie) OR (yang di)) ((wong sam) OR (wong siu)) ;~.
• Adding a wildcard symbol may retrieve word variants: wan yan ming ((hua gene) or (a gene)) ((yang jie) or (yang di)) ((wong sam) or (wong siu)) ;*.