Perhaps you should try some spelling variations:
based planning » basin planning, based learning
planning can » planning chain, planning case, planning land
china tan » china two, china taiwan
china top » china's top, china tips, china two
sang minh » kang minah, anh minh, song min
cong tan » hong tan, cong van, congo can

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