Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
tung tuan » trung tuan, hung tuan, quang tuan
nhung don » nhung van, nhung bo
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh tung tuan ((nhung don) OR (dung trong)) tan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh tung tuan ((nhung don) or (dung trong)) tan ((toan cau) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh tung tuan ((nhung don) or (dung trong)) tan ((toan cau) OR (toan ban))*.