Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
mot chieu » doi chieu
voi nhung » gioi nhung, thi nhung, ve nhung
ho chieu » theo chieu, hoc thieu, doi 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: ((ho chieu) or (mot chieu)) sach - manh trung ((voi nhung) or (va nhung)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (mot chieu)) sach - manh trung ((voi nhung) OR (va nhung)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (mot chieu)) sach - manh trung ((voi nhung) or (va nhung)) cong tac toan cau*.