Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
minh tong » minh cong, dinh tung, min hong
yan yang » yang yang, dan yang, tan yang
yao yang » yang yang
tong hui » wang hui
xi li » xi ai
li li » li l, li lu, li yi
wang » wing, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wang OR wan) ((yan yang) or (yao yang)) ((xi li) or (((li li) or (li lin)))) sang minh tong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wan) ((yan yang) OR (yao yang)) ((xi li) OR (((li li) OR (li lin)))) sang minh tong hui ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang OR wan) ((yan yang) or (yao yang)) ((xi li) or (((li li) or (li lin)))) sang minh tong hui ;*".