Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
hoc chiet » hoc thiet, hoc nhiet, hoc hien
ca thuong » cao thuong, cua thuong, va thuong
trinh ca » trinh cau, trinh cua, trinh cac
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh trinh ca thuong ((cong tan) OR (cong san)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - hanh trinh ca thuong ((cong tan) OR (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trinh ca thuong ((cong tan) OR (cong san)) toan ban*.