Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh dang » hanh dong, hanh dung, hanh mang
dung dung » ung dung, dung ung, dung dong
dung manh » duong manh, dung danh, hung manh
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 tap » toan ban

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