Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, nhung don
hoc chieu » hoc thieu, ho chieu, hoc hien
hang cong » dang cong, hang nong, bang cong
manh toan » thanh toan, anh tuan, tinh toan
trung va » truong va, trang va, trung ha
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 chieu sach - hanh trung va ((nhung cong) or (hang cong)) ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trung va ((nhung cong) OR (hang cong)) ((dan toan) OR (manh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trung va ((nhung cong) or (hang cong)) ((dan toan) or (manh toan)) cau*.