Perhaps you should try some spelling variations:
nam thucc » nam thuoc, am thuc, nam thu
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
xa hanh » xa thanh, xa khanh, va hanh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, dang xay
cua tre » cua te, cuu tre, cua triet
ang xa » lang xa, mang xa, dang xay

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((xang xa) or (ang xa)) hoi. hieu van ((nam thucc) or (nam thuc)) xa hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((xang xa) OR (ang xa)) hoi. hieu van ((nam thucc) OR (nam thuc)) xa hanh vai cua tre*.