Perhaps you should try some spelling variations:
wang yidan » wang yan
yang muxi » yang hui, yang mu
song minh » song min, song ming, gong min
sang minh » kang minah, anh minh, song min
yang jui » yang judy, yang di, yang yi
yang xi » yang di, yang yi
cong » congo, long, hong

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yidan ((((yang muxi) OR (yang jui))) OR (yang xi)) a ((song minh) OR (sang minh)) cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yidan ((((yang muxi) or (yang jui))) or (yang xi)) a ((song minh) OR (sang minh)) cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang yidan ((((yang muxi) or (yang jui))) or (yang xi)) a ((song minh) OR (sang minh)) cong shu ;*.