Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
xuc ban » duc ban, cuc ban, quoc ban
vai cua » dai cua, hai cua, lai cua
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: toc sach ky ((nang x) or (nang ma)) hoi. hieu ((qua cam) or (cua cac)) xuc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky ((nang x) OR (nang ma)) hoi. hieu ((qua cam) OR (cua cac)) xuc ban hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky ((nang x) or (nang ma)) hoi. hieu ((qua cam) or (cua cac)) xuc ban hanh vai cua tre*.