Perhaps you should try some spelling variations:
yan liang » yang liang, wang liang, you liang
sang minh » kang minah, anh minh, song min
minh tong » minh cong, dinh tung, min hong
lang yan » wang yan, wang yang, zhang yan
yang jin » yang jie, yang jun, ying jin
tong hui » wang hui
li sang » le sang, li gang, li san

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: lang yan ((yan liang) OR (yang jin)) li sang minh tong hui ;~.
• Adding a wildcard symbol may retrieve word variants: lang yan ((yan liang) or (yang jin)) li sang minh tong hui ;*.