Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh dang » hanh dong, hanh dung, hanh mang
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
anh dang » anh dong, anh dung, anh bang
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban, toan tap

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 - ((hanh dang) or (anh dang)) cua dung cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((hanh dang) OR (anh dang)) cua dung cong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((hanh dang) or (anh dang)) cua dung cong manh toan cao*.