Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
duong van » duong anh
yang jui » yang di, yang yi
cong van » congo can, cong sun
nan yan » nan ya, wang yan, qian yan
yang xi » yang di, yang yi
yi sang » yi gang, yi yang, yi sang's
judy » july

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: nan yan ((((yang jui) OR (yang xi))) OR (yang judy)) yi sang minh ((cong van) OR (duong van)) ;~.
• Adding a wildcard symbol may retrieve word variants: nan yan ((((yang jui) or (yang xi))) or (yang judy)) yi sang minh ((cong van) or (duong van)) ;*.