Perhaps you should try some spelling variations:
sach truc » cach thuc, sach tren, sach thu
sach tri » sach tai, sach tren, sach bai
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
van lam » van nam
lam cuc » lam cua, lam duoc, pham cuc
cuc ban » cua ban, cac ban, cuu ban
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu cua

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tri) OR (sach truc)) nang xa hoi. hieu van lam cuc ban hanh de cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tri) OR (sach truc)) nang xa hoi. hieu van lam cuc ban hanh de cua tre*.