Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
song thin » song shin, song jin, song min
tang min » chang min, yang mind, tang li
tong hui » wang hui
wan yan » nan yan, wai yan, wang yang
yang yi » yang di, yang xi, yang jui
yi lu » yi wu, yi xu, li lu

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) or (wang yan)) yang yi lu ((tang min) OR (sang minh)) ((tong hui) or (song thin)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wan yan) OR (wang yan)) yang yi lu ((tang min) OR (sang minh)) ((tong hui) OR (song thin)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan yan) or (wang yan)) yang yi lu ((tang min) OR (sang minh)) ((tong hui) or (song thin)) ;*".