Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
cam truc » cau truc, nam truc, lam truoc
hanh vai » hanh vi, hanh va, hanh tai
mai hoi » mai khoi, dai hoi, lai hoi
qua cam » qua cham, qua cac, qua ca
truc va » thuc va, thuc vat, trung va
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 2, sach vay

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