Perhaps you should try some spelling variations:
wang tan » wang yan, wang ban, wang tao
wang dan » wang yan, wang ban, wang yidan
laying a » laying _, playing _, buying a
yang jin » yang jie, yang jun, ying jin
kong siu » kong eiu, wong siu, dong sin
yan jiu » yang jie, pang jiu
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: ((wang tan) OR (wang dan)) laying a gene ((yan jiu) OR (yang jin)) ((wong lai) OR (kong siu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang tan) OR (wang dan)) laying a gene ((yan jiu) or (yang jin)) ((wong lai) or (kong siu)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang tan) OR (wang dan)) laying a gene ((yan jiu) or (yang jin)) ((wong lai) or (kong siu)) ;*.