Perhaps you should try some spelling variations:
mot chieu » doi chieu
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
ho chieu » theo chieu, hoc thieu, doi chieu
tinh cua » trinh cua, sinh cua, tinh chat
tong tac » tuong tac, trong tac, cong tac
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
cua han » cua hang, cua nhan, cua phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((theo tieu) or (mot chieu))) or (ho chieu)) xanh - hanh tinh cua han tong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((theo tieu) OR (mot chieu))) OR (ho chieu)) xanh - hanh tinh cua han tong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: ((((theo tieu) or (mot chieu))) or (ho chieu)) xanh - hanh tinh cua han tong tac toan ban*.