Perhaps you should try some spelling variations:
wang liang » wang yang
sang minh » kang minah, anh minh, song min
yang lin » yang jin, wang lin, yang li
jong min » gong min, song min, song ming
long du » long do, long run, long did
lin li » ling li, lin yi, yin li
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 yan) OR (wang liang)) yang lin li ((sang minh) OR (jong min)) ((long du) OR (long d)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yan) or (wang liang)) yang lin li ((sang minh) or (jong min)) ((long du) OR (long d)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yan) or (wang liang)) yang lin li ((sang minh) or (jong min)) ((long du) OR (long d)) ;*.