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 » cua khong, hoac khong, phuc khong
hoa khong » khoi khong, hoa cong, he khong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
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 (hoa khong)) ((cong dan) or (cong san)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trinh ((hua khong) OR (hoa khong)) ((cong dan) OR (cong san)) than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh trinh ((hua khong) OR (hoa khong)) ((cong dan) or (cong san)) than cap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trinh ((hua khong) OR (hoa khong)) ((cong dan) or (cong san)) than cap*.