Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
tieu xanh » tieu danh, dieu hanh, tien anh
hanh tang » hanh trang, anh tang, hanh mang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran cau » tran chau, toan cau, ran cau
tang va » trang va, tang van, thang va
va hang » van hang, va nang, va lang

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

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