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