Perhaps you should try some spelling variations:
wang tan » wang yan, wang ban, wang dan
tan ying » fan ying, ran ying, tan yang
ying jin » yang jin, jing ji, yang jie
wong siu » wong shiu, kong siu, wong sau
yan jiu » yang jie, yang jin, pang jiu
ying a » buying a, laying a, ying hua
a gene » a genre, a gender, a gentle

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang tan ying a gene ((yan jiu) or (ying jin)) ((wong lai) or (wong siu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang tan ying a gene ((yan jiu) OR (ying jin)) ((wong lai) OR (wong siu)) ;.
• Adding a wildcard symbol may retrieve word variants: wang tan ying a gene ((yan jiu) or (ying jin)) ((wong lai) or (wong siu)) ;*.