Perhaps you should try some spelling variations:
land planning » based planning, road planning
dam planning » term planning, from planning, 2 planning
case china » care china, catte china, use china
china yang » china ying, china wang, china chang
yang tang » yang yang, tang tang, nang trang
minh hong » minh cong, min hong, linh hoang
tin hong » tan hong, kia hong, thi hong
tang » thang
tan » than

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)) case china yang tang ((minh hong) OR (tin hong)) tan ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((land planning) OR (dam planning)) case china yang tang ((minh hong) or (tin hong)) tan ;~".
• Adding a wildcard symbol may retrieve word variants: ((land planning) OR (dam planning)) case china yang tang ((minh hong) or (tin hong)) tan ;*.