Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh dong » anh dong, ha dong
cua thong » cua thuong, cua khong, cua tong
thong tan » thong than, thong tran, thong tin
doc hieu » toc thieu, hoc thieu, hoc hien
dong cua » dung cua, cong cua, huong cua
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (doc hieu)) tinh - hanh dong cua thong thong tan ((than cao) OR (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doc hieu)) tinh - hanh dong cua thong thong tan ((than cao) OR (than cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (doc hieu)) tinh - hanh dong cua thong thong tan ((than cao) OR (than cap))".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doc hieu)) tinh - hanh dong cua thong thong tan ((than cao) OR (than cap))*.