Perhaps you should try some spelling variations:
sach truc » cach thuc, sach tren, sach thue
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 truc) or (sach thu)) nang xa hoi. hieu van cam cuc ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach truc) OR (sach thu)) nang xa hoi. hieu van cam cuc ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach truc) or (sach thu)) nang xa hoi. hieu van cam cuc ban hanh vi cua tre*.