Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
khong cong » thong cong, khong cang, chong cong
cua khong » hua khong, cua phuong, cua thuong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: ((theo chieu) or (theo tieu)) xanh - ((hanh trang) OR (hanh trinh)) cua khong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) xanh - ((hanh trang) OR (hanh trinh)) cua khong cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) xanh - ((hanh trang) OR (hanh trinh)) cua khong cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) xanh - ((hanh trang) OR (hanh trinh)) cua khong cong tac toan cau*.