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, chi hanh
cong tan » cong tac, cong san, cong thanh
tran cao » toan cao, tran chau, trang cho
doi chi » doi khi

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 - ((hanh trinh) or (canh tranh)) cua khong cong tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((hanh trinh) OR (canh tranh)) cua khong cong tan tran cao.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((hanh trinh) or (canh tranh)) cua khong cong tan tran cao*.