Perhaps you should try some spelling variations:
china plain » china main, china gain, china grain
wang yuan » wang yuhan, wang yan, fang yuan
yuan wang » yan wang, yuan kang, yuan chang
dang hadi » dang hai
chun lan » chia lan, chun wai
wang lin » wang li, wang qin, yang lin
yang jie » yang jin, yang di, yang jui

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 yuan wang ((chun lan) OR (china plain)) ((wang lin) OR (yang jie)) dang hadi ;~.
• Adding a wildcard symbol may retrieve word variants: wang yuan wang ((chun lan) or (china plain)) ((wang lin) or (yang jie)) dang hadi ;*.