Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
gang minh » kang minah, anh minh, gong min
tong shui » tong hui, cong shu, gong hui
yan yang » yang yang, yao yang, dan yang
wan yan » wang yan, nan yan, wai yan
yang xi » yang di, yang yi, yang jui
long du » long d, long do, long run
xi i » xi ai, i i, ii i

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan yang xi i ((gang minh) or (sang minh)) ((long du) or (tong shui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan yang xi i ((gang minh) OR (sang minh)) ((long du) OR (tong shui)) ;*.