Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
nhanh mang » nhanh lang, hanh mang, nhanh quang
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
mang cua » manh cua, dung cua, ban cua
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 (theo tieu)) sach - nhanh mang cua ((nhung cong) OR (dung cong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - nhanh mang cua ((nhung cong) OR (dung cong)) manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) sach - nhanh mang cua ((nhung cong) OR (dung cong)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sach - nhanh mang cua ((nhung cong) OR (dung cong)) manh toan cau*.