Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song ming
yan yang » yang yang, dan yang, tan yang
yao yang » yang yang
song min » song ming, gong min, jong min
long shu » cong shu, tong shui, long du
li li » li lin, li l, li lu
wang » wing, wan, 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 ((yan yang) OR (yao yang)) li li ((sang minh) or (song min)) long shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan yang) OR (yao yang)) li li ((sang minh) OR (song min)) long shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yang) OR (yao yang)) li li ((sang minh) or (song min)) long shu ;*".