Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
theo chieu » ho chieu, theo chu, thi chieu
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
hang cong » dang cong, hang nong, bang cong
tinh cua » trinh cua, sinh cua, tinh chat
van tan » van tuan, van ban, van tai
tan cau » toan cau, van cau, tan ca

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

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