Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
cong doan » cong hoan, dong doanh, cong san
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, cong tan, huong dan
phan dau » phan tu, hang dau
phan cac » nhan cach, phan lap, phan van

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 - hanh tang cua nhung ((cong doan) OR (cong dan)) ((phan dau) OR (phan cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh tang cua nhung ((cong doan) OR (cong dan)) ((phan dau) or (phan cac))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh tang cua nhung ((cong doan) OR (cong dan)) ((phan dau) or (phan cac))*.