Perhaps you should try some spelling variations:
china plain » china main, china grain, china play
china gain » china grain, china main, china going
wang qian » wang qiao, wang qin, wang liang
qian wang » yiqian wang, qian rong, qian yan
dang haji » dang hai, dato haji
yang jin » yang jie, yang jun, ying jin

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 qian wang ((china gain) OR (china plain)) ((yang di) OR (yang jin)) dang haji ;~.
• Adding a wildcard symbol may retrieve word variants: wang qian wang ((china gain) or (china plain)) ((yang di) or (yang jin)) dang haji ;*.