Perhaps you should try some spelling variations:
wang planning » range planning, land planning, kong planning
planning can » planning chain, planning case, planning land
china grain » china gain, china main, china plain
chia going » china going
chang hai » chang ha, shang hai, change has
yang jin » yang jie, yang jun, shang jin
ying jin » jing ji, yang jie

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 planning can ((china grain) OR (chia going)) ((yang jin) OR (ying jin)) chang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wang planning can ((china grain) or (chia going)) ((yang jin) or (ying jin)) chang hai ;*.