Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
cong tan » cong tac, cong san, cong thanh
bang cau » hang cau, nang cao, hang ca
bang cac » nang cao, hang ca, dung cac
luat » luan, xuat

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 ((trinh luat) OR (tinh cua)) thong cong tan ((bang cau) OR (bang cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh ((trinh luat) or (tinh cua)) thong cong tan ((bang cau) OR (bang cac))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((trinh luat) or (tinh cua)) thong cong tan ((bang cau) OR (bang cac))*.