Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
manh trung » manh tung, thanh trung, manh hung
trung tuan » trung thanh, trung tam, tran tuan
tuan ban » tuan bang, toan ban, luan ban
ban cong » bang cong, van cong, phan cong
san toan » van toan, manh toan, xuan toan
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((dieu hanh) or (chieu sach)) - manh trung tuan ban cong ((san toan) or (dan toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (chieu sach)) - manh trung tuan ban cong ((san toan) OR (dan toan)) tap.
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (chieu sach)) - manh trung tuan ban cong ((san toan) or (dan toan)) tap*.