Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
mot chieu » doi chieu, ho chieu
hoc thieu » toc thieu, hoc hien
luan cong » luong cong, luan chung, luan luong
luat cong » thuat cong, luat chung, cua cong
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: ((mot chieu) or (hoc thieu)) sach - thanh dung ((luan cong) OR (luat cong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (hoc thieu)) sach - thanh dung ((luan cong) OR (luat cong)) cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (hoc thieu)) sach - thanh dung ((luan cong) OR (luat cong)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (hoc thieu)) sach - thanh dung ((luan cong) OR (luat cong)) cong tac toan cau*.