Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung nong » nhung cong, nhung bong, nhung chong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
tang cua » mang cua, hang cua, tang luan
dan toan » van toan, dan than, xuan 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 ((hieu manh) or (chieu sach)) - hanh tang cua nhung nong ((dan toan) OR (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sach)) - hanh tang cua nhung nong ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu sach)) - hanh tang cua nhung nong ((dan toan) OR (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sach)) - hanh tang cua nhung nong ((dan toan) OR (manh toan)) cao*.