Perhaps you should try some spelling variations:
wang dong » wang yong, wang hong, wang yang
dong nan » dong yang, dong sin, dong bin
pay gain » pay gap, pay fair, pid gain
pay gaps » pay gap
yang jin » yang jun, ying jin, shang jin
yang jie » yang di, yang jui, yang xi
kang hay » eang hay, kang han, dang hai

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 dong nan ((pay gain) OR (pay gaps)) ((yang jin) OR (yang jie)) kang hay ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang dong nan ((pay gain) OR (pay gaps)) ((yang jin) or (yang jie)) kang hay ;~".
• Adding a wildcard symbol may retrieve word variants: wang dong nan ((pay gain) OR (pay gaps)) ((yang jin) or (yang jie)) kang hay ;*.