Perhaps you should try some spelling variations:
wang yidan » wang yan
gang minh » sang minh, kang minah, anh minh
wang dan » wang yan, wang ban, wang yang
yang jin » yang jie, yang jun, ying jin
liu gang » liu gangs, liu yang, li gang
long du » long do, long run, long did
long d » long do, long _, long 2

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 dan) OR (wang yidan)) ((yang jin) OR (yang judy)) liu gang minh ((long d) OR (long du)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang dan) or (wang yidan)) ((yang jin) or (yang judy)) liu gang minh ((long d) OR (long du)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang dan) or (wang yidan)) ((yang jin) or (yang judy)) liu gang minh ((long d) OR (long du)) ;*.