Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh tung » thanh cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tung tuan » trung tuan, hung tuan, quang tuan
tuan dang » tran dang, tuan bang, tuan dung
dang cong » dung cong
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 chiet tach - thanh tung tuan dang cong ((dan toan) OR (tinh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - thanh tung tuan dang cong ((dan toan) OR (tinh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - thanh tung tuan dang cong ((dan toan) OR (tinh toan)) cau*.