Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu tach » chiet tach, chieu sach, chiu trach
trinh vet » trinh viet, trinh vat, trinh ven
trinh ve » trinh he, trinh va, trinh vi
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
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 chieu tach - hanh ((trinh ve) or (trinh vet)) hang ((cong tan) OR (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu tach - hanh ((trinh ve) OR (trinh vet)) hang ((cong tan) OR (cong san)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tach - hanh ((trinh ve) or (trinh vet)) hang ((cong tan) OR (cong san)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu tach - hanh ((trinh ve) or (trinh vet)) hang ((cong tan) OR (cong san)) toan tap*.