Perhaps you should try some spelling variations:
yuan wang » yan wang, yuan kang, yuan chang
qian wang » yiqian wang, qian rong, qian yan
hong than » hong tan, long thanh, hong hai
than wong » thang long, than one, than done
wong sam » wong sau, wong lai, kong sar
a1 gene » 1 gene, 11 gene, l1 gene
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: ((yuan wang) OR (qian wang)) yang ((a gene) OR (a1 gene)) hong than wong sam ;~.
• Adding a wildcard symbol may retrieve word variants: ((yuan wang) or (qian wang)) yang ((a gene) or (a1 gene)) hong than wong sam ;*.