Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
tran tuan » tran xuan, tran quang, tran thanh
dung cua » dung luan, dung cho
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - thanh ((dung cua) or (tran tuan)) nhung ((cong dan) OR (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((dung cua) OR (tran tuan)) nhung ((cong dan) OR (cong tan)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh ((dung cua) or (tran tuan)) nhung ((cong dan) OR (cong tan)) phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((dung cua) or (tran tuan)) nhung ((cong dan) OR (cong tan)) phan cau*.