Perhaps you should try some spelling variations:
yang july » yang judy, yang jun
yang jui » yang judy, yang yi
gong min » jong min, song min, gong meng
min cong » minh cong, min hong, min jeong
cong van » congo can, duong van, cong sun
wan yan » wang yan, nan yan, wai yan
yang xi » yang yi
yu gong » wu gong, yu gang, you going

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: wan yan ((((((yang jui) OR (yang di))) OR (yang xi))) OR (yang july)) yu gong min cong van ;~.
• Adding a wildcard symbol may retrieve word variants: wan yan ((((((yang jui) or (yang di))) or (yang xi))) or (yang july)) yu gong min cong van ;*.