Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
hanh mang » nhanh mang, hanh trang, nhanh lang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cao » toan ban, toan tap
mang va » mang vua, hang va, bang va
va dung » van dung, va duong, vat dung

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 (theo tieu)) sach - hanh mang va dung ((cong tan) OR (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - hanh mang va dung ((cong tan) OR (cong san)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) sach - hanh mang va dung ((cong tan) OR (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sach - hanh mang va dung ((cong tan) OR (cong san)) toan cao*.