Perhaps you should try some spelling variations:
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky mang » ky nang, ke mang, ky dang
may hoa » may khoa, ma hoa, day hoa
hieu ve » hieu va, hieu van
dao duc » giao duc, tao duoc
cua tre » cua te, cuu tre, cua triet
ve dao » de dao, va dao, ve bao
di cua » dai cua, doi cua, de 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 ky mang may hoa. hieu ve dao duc ((ban hanh) or (va thanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky mang may hoa. hieu ve dao duc ((ban hanh) OR (va thanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky mang may hoa. hieu ve dao duc ((ban hanh) or (va thanh)) di cua tre*.