Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh
nhung cong » dung cong, thong cong, hang cong
toc chieu » toc thieu, doc hieu, hoc thieu
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, ran cau, tra cau
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc chieu xanh - ((hanh trinh) or (hanh chinh)) va nhung cong tan ((tran cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu xanh - ((hanh trinh) OR (hanh chinh)) va nhung cong tan ((tran cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc chieu xanh - ((hanh trinh) or (hanh chinh)) va nhung cong tan ((tran cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: toc chieu xanh - ((hanh trinh) or (hanh chinh)) va nhung cong tan ((tran cau) OR (toan cau))*.