Perhaps you should try some spelling variations:
qua pham » quan pham, quy pham, qua cham
hanh vai » hanh vi, hanh va, hanh tai
sach xa » sach dao, sach nha, sach bai
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2

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 v) or (sach xa)) lang xa hoi. hieu qua pham duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach xa)) lang xa hoi. hieu qua pham duc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach xa)) lang xa hoi. hieu qua pham duc va hanh vai cua tre*.