Perhaps you should try some spelling variations:
duong van » cong van, duong anh
yuan kang » yuan wang, yuan chang, chan kang
yang jong » yang jing, hong jong, yang yang
wing yan » wang yan, wing ian, wang yang
wing tan » wing ian, liang tan, hong tan
yuan kai » yuan fei, tan kai, yuan hui
jong min » gong min, song min, song ming

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: ((wing yan) OR (wing tan)) duong van ((yuan kang) OR (yuan kai)) yang jong min ;~.
• Adding a wildcard symbol may retrieve word variants: ((wing yan) or (wing tan)) duong van ((yuan kang) or (yuan kai)) yang jong min ;*.