Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, truong thanh
chung cong » nhung cong, chong cong, phung cong
hoc chieu » hoc thieu, ho chieu, hoc hien
tran tuan » tran xuan, tran quang, tran thanh
danh toan » manh toan, anh toan, dang 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: hoc chieu sach - manh ((trung tuan) or (tran tuan)) chung cong ((danh toan) OR (dan toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - manh ((trung tuan) OR (tran tuan)) chung cong ((danh toan) OR (dan toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - manh ((trung tuan) or (tran tuan)) chung cong ((danh toan) OR (dan toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - manh ((trung tuan) or (tran tuan)) chung cong ((danh toan) OR (dan toan)) cao*.