Perhaps you should try some spelling variations:
thu hang » thi hang, thu huong, thu trang
hieu van » hieu va, thien van, lieu va
cau thuc » cau truc, cuu thuc, can thuc
vat hanh » vat thanh, van hanh, va hanh
te sach » toc sach
van cau » van dau, van hau, van chat
cua tre » cua te, cuu tre, cua triet
co loi » co hoi
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((thu hang) or (thuc hanh)) co loi. hieu van cau thuc vat hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu hang) OR (thuc hanh)) co loi. hieu van cau thuc vat hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((thu hang) or (thuc hanh)) co loi. hieu van cau thuc vat hanh vi cua tre*.