Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
hanh trinh » hanh chinh
cua khong » hua khong, cua phuong, cua thuong
chi xanh » chi anh, chi danh, chieu xanh
chi hanh » chi nhanh, chi thanh, thi hanh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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: doi ((chi xanh) OR (chi hanh)) - ((hanh trinh) or (canh tranh)) cua khong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi hanh)) - ((hanh trinh) OR (canh tranh)) cua khong cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) OR (chi hanh)) - ((hanh trinh) or (canh tranh)) cua khong cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) OR (chi hanh)) - ((hanh trinh) or (canh tranh)) cua khong cong tan toan cao*.