Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » hanh chinh
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
vat thong » va thong, vat trong, mat thong
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - ((canh tranh) or (hanh trinh)) vat thong cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - ((canh tranh) OR (hanh trinh)) vat thong cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((canh tranh) or (hanh trinh)) vat thong cong tan tran cau*.