Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
hang cong » dang cong, hang nong, bang cong
va hang » van hang, va nang, va lang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((hanh trang) OR (hanh trinh)) va hang cong ((tinh toan) OR (anh tuan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - ((hanh trang) OR (hanh trinh)) va hang cong ((tinh toan) or (anh tuan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((hanh trang) OR (hanh trinh)) va hang cong ((tinh toan) or (anh tuan)) cau*.