Perhaps you should try some spelling variations:
land planning » based planning, road planning, dam planning
planning can » planning chain, planning case, planning land
china tan » china top, china two, china taiwan
minh hong » minh cong, min hong, linh hoang
tan sang » tan yang, tang tang, tan hong
tin hong » tan hong, kia hong, thi hong

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: land planning can china tan sang ((minh hong) OR (tin hong)) tan ;~.
• Adding a wildcard symbol may retrieve word variants: land planning can china tan sang ((minh hong) or (tin hong)) tan ;*.