Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
zhang yan » zhang fan, zhang jian, wang yan
gang minh » kang minah, anh minh, gong min
sang minh » kang minah, anh minh, song min
yang lu » yang du, yang li, yang mu
long du » long d, long do, long run
lu yi » wu yi, li yi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) or (zhang yan)) yang lu yi ((gang minh) or (sang minh)) long du ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (zhang yan)) yang lu yi ((gang minh) OR (sang minh)) long du ;*.