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

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yuan kang ((chun lan) OR (china grain)) ((wang li) OR (yang jie)) dang hadi ;~".
• Adding a wildcard symbol may retrieve word variants: wang yuan kang ((chun lan) OR (china grain)) ((wang li) OR (yang jie)) dang hadi ;*.