Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
dong yan » dong yang, dong nan, wang yan
yan wang » yuan wang, yang yang, qian wang
wang hui » wang hua, wang zhi, wang wei
tang min » chang min, yang mind, tang li
hui fan » zhai fan, hui kian, hui yang
cong » congo, long, hong

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong yan wang hui fan ((tang min) or (sang minh)) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yan wang hui fan ((tang min) OR (sang minh)) cong shu ;*.