Perhaps you should try some spelling variations:
sach tranh » canh tranh
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
hanh di » hanh vi, hanh de, hang di
cuu ban » cuu van, cua ban, cuu san
cuc ban » cua ban, cac ban, duc ban
van lam » van nam
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tranh ((nang xa) OR (lang xa)) hoi. hieu van lam ((cuc ban) OR (cuu ban)) hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tranh ((nang xa) OR (lang xa)) hoi. hieu van lam ((cuc ban) or (cuu ban)) hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach tranh ((nang xa) OR (lang xa)) hoi. hieu van lam ((cuc ban) or (cuu ban)) hanh di cua tre*.