Perhaps you should try some spelling variations:
thien tinh » khien tinh, thien minh, tien tinh
trien minh » trien kinh, tien minh, trieu minh
luan nhung » luan chung, luan hung, quan nhung
hanh dung » thanh dung, anh dung, hanh dong
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien tinh) or (trien minh)) - hanh dung luan nhung ((cong tan) or (huong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien tinh) OR (trien minh)) - hanh dung luan nhung ((cong tan) OR (huong dan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien tinh) or (trien minh)) - hanh dung luan nhung ((cong tan) or (huong dan)) toan cao*.