Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thong cong » trong cong, tong cong, thong thong
hanh dong » anh dong, ha dong
cua thong » cua thuong, cua khong, cua tong
tan thanh » tran thanh, tang thanh, toan thanh
doc hieu » toc thieu, hoc thieu, hoc hien
dong cua » dung cua, cong cua, huong cua
tan than » tan tran, ban than, tam than

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