Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
vai cua » dai cua, hai cua, lai cua
xuc ban » duc ban, cuc ban, quoc ban
qua cam » qua cham, qua cac, qua ca
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
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: ((te sach) OR (toc sach)) ky ((nang xa) or (nang ma)) hoi. hieu qua cam xuc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky ((nang xa) OR (nang ma)) hoi. hieu qua cam xuc ban hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky ((nang xa) or (nang ma)) hoi. hieu qua cam xuc ban hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky ((nang xa) or (nang ma)) hoi. hieu qua cam xuc ban hanh vai cua tre*.