Perhaps you should try some spelling variations:
thanh tung » thanh cong
tung quan » tuong quan, trung quan, dung quan
quan hanh » quan thanh, quang thanh, quang khanh
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
chan cau » can cau, chinh cau, nhanh cau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - thanh tung quan hanh ((cong ban) or (cong san)) ((chan cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - thanh tung quan hanh ((cong ban) OR (cong san)) ((chan cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - thanh tung quan hanh ((cong ban) or (cong san)) ((chan cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh tung quan hanh ((cong ban) or (cong san)) ((chan cau) OR (phan cau))*.