Perhaps you should try some spelling variations:
quang tuan » quang thanh, quan luan, quang cua
doi chieu » doi chi, mot chieu, ho chieu
hung cong » nhung cong, hung cuong, phung cong
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
tan toan » tan tran, tap toan, van 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: ((doi chieu) OR (doc hieu)) sach - nhanh quang tuan ((hung cong) or (dung cong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) sach - nhanh quang tuan ((hung cong) OR (dung cong)) tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) sach - nhanh quang tuan ((hung cong) or (dung cong)) tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) sach - nhanh quang tuan ((hung cong) or (dung cong)) tan toan cau*.