Perhaps you should try some spelling variations:
sach tham » sach nha
cac thuc » cach thuc, cac thu, can thuc
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
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 tham ((nang xa) OR (nang x)) hoi. hieu va cac thuc day hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tham ((nang xa) OR (nang x)) hoi. hieu va cac thuc day hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach tham ((nang xa) OR (nang x)) hoi. hieu va cac thuc day hanh vai cua tre*.