Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
sang minh » kang minah, anh minh, song ming
song min » song ming, gong min, jong min
yang zi » yang di, yang xi, yang yi
le sang » lee sang, le dang
zi le » i le, ii le

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yang zi le sang minh (((cong or long) shu) or (song min)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yang zi le sang minh (((cong OR long) shu) OR (song min)) ;.
• Adding a wildcard symbol may retrieve word variants: wang yang yang zi le sang minh (((cong or long) shu) or (song min)) ;*.