Perhaps you should try some spelling variations:
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hanh manh » hanh mang, lanh manh, hoang manh
qua trong » quan trong, qua trinh, qua song
manh qua » manh quan, manh cua, danh qua
dan toan » van toan, dan than, manh toan
van than » van thanh, van thang, van tuan

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 - hanh manh qua trong cong ((dan toan) or (van than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh manh qua trong cong ((dan toan) OR (van than)) ban*.