Perhaps you should try some spelling variations:
china grain » china gain, china main, china plain
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
yang lin » wang lin, yang li, yang liang
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 yuan wang ((chun lan) OR (china grain)) ((yang lin) OR (yang jin)) dang hadi ;~.
• Adding a wildcard symbol may retrieve word variants: wang yuan wang ((chun lan) or (china grain)) ((yang lin) or (yang jin)) dang hadi ;*.