Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nhung dung » phuong dung, ung dung, thong dung
dung manh » duong manh, dung danh, hung manh
manh toan » thanh toan, anh tuan, tinh toan
hanh han » hanh nhan, hanh phan, hanh san
toan ban » van ban
han va » hang va, hanh va, nhan va

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) or (chiet tach)) - hanh han va nhung dung manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - hanh han va nhung dung manh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chiet tach)) - hanh han va nhung dung manh toan ban*.