Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
trung tuan » trung thanh, trung tam, tran tuan
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong tac » cong ty
tran cau » tran chau, ran cau, tra cau
toan cau » toan cao, toan ban, toan tap

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 tuan nhung cong tac ((tran cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo chieu)) sach - thanh trung tuan nhung cong tac ((tran cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (theo chieu)) sach - thanh trung tuan nhung cong tac ((tran cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo chieu)) sach - thanh trung tuan nhung cong tac ((tran cau) OR (toan cau))*.