Perhaps you should try some spelling variations:
thieu hang » thieu khang, thieu quang, thi hang
hieu van » hieu va, thien van, lieu va
cau thuc » cau truc, can thuc, cau phuc
cuu thuc » cuu tac
ban hanh » ban hang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ca loi » va loi, la loi, cua loai
co loi » co hoi
vi cua » vai cua, di cua

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: te sach thieu hang ((ca loi) OR (co loi)). hieu van ((cau thuc) OR (cuu thuc)) ban hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thieu hang ((ca loi) OR (co loi)). hieu van ((cau thuc) or (cuu thuc)) ban hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach thieu hang ((ca loi) OR (co loi)). hieu van ((cau thuc) or (cuu thuc)) ban hanh vi cua tre*.