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
hay khong » bay khong, hang khong, hoac khong
thanh cac » hanh cac, thanh bac, thanh ca
ha khong » hoa khong, hua khong, he khong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac

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