Perhaps you should try some spelling variations:
land planning » based planning, road planning, dam planning
planning gain » planning chain, planning against, planning guide
luong thanh » long thanh, truong thanh
gain china » spain china, can china, dan china
hong than » hong tan, long thanh, hong hai
china ip » china i, china ii, china im
ip using » up using, ahp using, top using
using ti » using tik, using tri, using ai

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 gain china ip using ti ((luong thanh) OR (hong than)) ;~.
• Adding a wildcard symbol may retrieve word variants: land planning gain china ip using ti ((luong thanh) or (hong than)) ;*.