Perhaps you should try some spelling variations:
trong thuat » trong hoat, trong thu, trong phat
tranh thuat » tranh chua, tranh thai
theo chieu » ho chieu, theo chu, thi chieu
nhung cong » dung cong, thong cong, hang cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: ((theo chieu) or (theo tieu)) sach - canh ((tranh thuat) OR (trong thuat)) nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - canh ((tranh thuat) OR (trong thuat)) nhung cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) sach - canh ((tranh thuat) OR (trong thuat)) nhung cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sach - canh ((tranh thuat) OR (trong thuat)) nhung cong tac toan cao*.