Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
theo chieu » ho chieu, theo chu, thi chieu
quan cong » luan cong, quan dong, quan long
qua cong » cua cong, qua song, va cong
dong tac » cong tac, dong tai, dong bac
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 - thanh truong ((quan cong) OR (qua cong)) dong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - thanh truong ((quan cong) OR (qua cong)) dong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) sach - thanh truong ((quan cong) OR (qua cong)) dong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sach - thanh truong ((quan cong) OR (qua cong)) dong tac toan cao*.