Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
theo lieu » theo tieu, theo yeu, thi lieu
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
mang cua » manh cua, dung cua, ban cua
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo lieu) or (theo chieu)) tinh - hanh mang cua ((dang cong) OR (dung cong)) tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo lieu) OR (theo chieu)) tinh - hanh mang cua ((dang cong) OR (dung cong)) tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo lieu) or (theo chieu)) tinh - hanh mang cua ((dang cong) OR (dung cong)) tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ((theo lieu) or (theo chieu)) tinh - hanh mang cua ((dang cong) OR (dung cong)) tac toan tap*.