Perhaps you should try some spelling variations:
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
cham xu » chao xu, cham cuu, chat xuc
vai cua » dai cua, hai cua, lai cua
va cham » va chat, va tham
sach ky » sac ky, sach y, sach kem
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet

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

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