Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, doi chi, mot chieu
tuan dong » tuan duong, quan dong, luan dong
dong cong » duong cong, dung cong, dang cong
tren thuc » trien thuc, tron thuc, trinh thuc
ho chieu » theo chieu, hoc thieu, mot chieu
cong tac » cong ty
tren cau » tren ca, tren cay, tren tau

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

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