Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » hanh chinh
chan dung » van dung, dan dung
trong tac » trong cac, tuong tac, trong tan
ho chieu » hoc thieu, doi chieu, mot chieu
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo chieu)) tinh - ((hanh trinh) or (canh tranh)) chan dung trong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) tinh - ((hanh trinh) OR (canh tranh)) chan dung trong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) tinh - ((hanh trinh) or (canh tranh)) chan dung trong tac toan tap*.