Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh chat » thanh cha, thanh cham, thanh chau
ban thanh » ban hanh, ban hang
chat cua » nhat cua, chat va, chat huu
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
va lam » van lam
va lap » va dap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (te sach)) ky nang ma hoa. hieu ((va lam) or (va lap)) dua ban thanh chat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (te sach)) ky nang ma hoa. hieu ((va lam) OR (va lap)) dua ban thanh chat cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (te sach)) ky nang ma hoa. hieu ((va lam) or (va lap)) dua ban thanh chat cua tre*.