Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
quoc ban » quoc bao, quoc lan, quoc quan
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
xuc ban » duc ban, cuc ban, xuat 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 thu) or (sach ty)) nang xa hoi. hieu van nam ((xuc ban) or (quoc ban)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach ty)) nang xa hoi. hieu van nam ((xuc ban) OR (quoc ban)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach ty)) nang xa hoi. hieu van nam ((xuc ban) or (quoc ban)) hanh vi cua tre*.