Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thanh tung » thanh cong
duong cong » dung cong, luong cong, duong trong
hoc thieu » toc thieu, hoc hien
cau duong » hai duong, con duong, van duong
tung cau » trung cau, dung cau, trung cap
cong tac » cong ty
tren cau » tren ca, tren cay, trinh cau
tren tau » tren thuc, tren may, tren dat

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 (hoc thieu)) sach - thanh tung cau duong cong tac ((tren cau) or (tren tau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc thieu)) sach - thanh tung cau duong cong tac ((tren cau) OR (tren tau)).
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (hoc thieu)) sach - thanh tung cau duong cong tac ((tren cau) or (tren tau))*.