Perhaps you should try some spelling variations:
yan ying » fan ying, ran ying, tan ying
yang jie » yang jin, yang di, yang jui
wong sam » wong sau, wong lai, von sam
wong siu » wong shiu, kong siu, wong sau
yan jiu » yang jin, pang jiu
ying a » buying a, laying a, ying hua
a gene » a genre, a gender, a gentle
wang » wing, wan, lang

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

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