Perhaps you should try some spelling variations:
dam planning » term planning, from planning, land planning
planning can » planning chain, planning case, planning land
china top » china's top, china tips, china two
cong tan » hong tan, congo can, cong sun
cong van » congo can, duong van, cong sun
minh » mind, ming, mine

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: dam planning can china top anh minh ((cong tan) OR (cong van)) ;~.
• Adding a wildcard symbol may retrieve word variants: dam planning can china top anh minh ((cong tan) or (cong van)) ;*.