Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
doi chieu » doc hieu, doi chi, mot chieu
tong cong » trong cong, cong cong, dung cong
ho chieu » theo chieu, hoc thieu, mot chieu
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (ho chieu)) xanh - ((hanh trinh) or (canh tranh)) han tong cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - ((hanh trinh) OR (canh tranh)) han tong cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) xanh - ((hanh trinh) or (canh tranh)) han tong cong tan toan ban*.