Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
song minh » sang minh, song min, song ming
zhang zhi » zhong zhi, wang zhi, zhang wei
hong shu » cong shu, tong shui, wong shiu
yan yan » yan yuan, nan yan, wang yan
li song » li cong, li rong, kim song
wang » wing, wan, lang

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 ((yan yan) OR (yang yang)) muxi li song minh ((hong shu) OR (zhang zhi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yan) OR (yang yang)) muxi li song minh ((hong shu) or (zhang zhi)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yan) OR (yang yang)) muxi li song minh ((hong shu) or (zhang zhi)) ;*.