Perhaps you should try some spelling variations:
sach tri » sach tai, sach tren, sach truc
tri nang » thi nang, tra nang, tri bang
thuc day » thuc dan
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
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: te sach tri nang xa hoi. hieu qua cac ((thuc day) or (thuc vat)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tri nang xa hoi. hieu qua cac ((thuc day) OR (thuc vat)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach tri nang xa hoi. hieu qua cac ((thuc day) or (thuc vat)) hanh vai cua tre*.