Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
song minh » sang minh, song min, song ming
liang li » ling li, qiang li, liang wei
yan yan » yan yuan, nan yan, wang yan
li song » li cong, li rong, kim song
wang » wing, wan, lang
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: wang ((yan yan) OR (yang yang)) liang li song minh cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yan) OR (yang yang)) liang li song minh cong shu ;*".