Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang vinh » sang minh, yang jing, yang lin
yang jin » yang jie, yang jun, ying jin
wong sau » wong sam, wong siu, wong shiu
yang ya » yang yao, yang yi, yang ka
yu chen » yu cheng, yi chen, yulu chen
long du » long d, long do, long run

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang ya yu chen ((yang vinh) or (yang jin)) ((long du) or (wong sau)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang ya yu chen ((yang vinh) OR (yang jin)) ((long du) OR (wong sau)) ;*.