Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
hoc thieu » toc thieu, hoc hien
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (theo chieu)) sach - thanh trung ((cua dung) OR (cua dong)) cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo chieu)) sach - thanh trung ((cua dung) OR (cua dong)) cong tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (theo chieu)) sach - thanh trung ((cua dung) OR (cua dong)) cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo chieu)) sach - thanh trung ((cua dung) OR (cua dong)) cong tan than cau*.