Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
hua khong » hoa khong, hoac khong, phuc khong
cua khong » cua phuong, cua thuong, cua cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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 trinh ((hua khong) or (cua khong)) cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trinh ((hua khong) OR (cua khong)) cong dan than cap.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trinh ((hua khong) or (cua khong)) cong dan than cap*.