Perhaps you should try some spelling variations:
zhang ying » zhang ming, zhang jing, zhang ping
yang yang » wang yang, wang yan
sang minh » kang minah, anh minh, song min
minh tung » dinh tung, minh cong, ming hung
tung hui » tong hui, wang hui, tung duc
li sang » le sang, li gang, li san
xi li » li li, xi ai

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((zhang ying) or (yang yang)) xi li sang minh tung hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((zhang ying) OR (yang yang)) xi li sang minh tung hui ;*.