Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cao » toan cao, thai cao, than cap

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 xanh - hanh trinh ((cua dung) OR (cua dong)) ((cong dan) or (cong san)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh trinh ((cua dung) OR (cua dong)) ((cong dan) OR (cong san)) than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh trinh ((cua dung) OR (cua dong)) ((cong dan) or (cong san)) than cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh trinh ((cua dung) OR (cua dong)) ((cong dan) or (cong san)) than cao*.