Perhaps you should try some spelling variations:
land planning » based planning, road planning
dam planning » term planning, from planning, 2 planning
china top » china's top, china two
hong than » hong tan, long thanh, hong hai
song tin » song jin, song min, song shin
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) OR (dam planning)) can ((china top) OR (china tips)) song tin hong than ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((land planning) OR (dam planning)) can ((china top) or (china tips)) song tin hong than ;~".
• Adding a wildcard symbol may retrieve word variants: ((land planning) OR (dam planning)) can ((china top) or (china tips)) song tin hong than ;*.