Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, theo chu, thi chieu
manh trung » manh tung, manh hung, sinh trung
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
ho chieu » hoc thieu, doi chieu, mot chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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 (ho chieu)) sach - ((thanh trung) or (manh trung)) cua nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - ((thanh trung) OR (manh trung)) cua nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) sach - ((thanh trung) or (manh trung)) cua nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) sach - ((thanh trung) or (manh trung)) cua nhung cong tac toan cau*.