Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach tri » sach tai, sach tren, sach truc
hanh di » hanh vi, hanh de, hang di
cuc ban » cac ban, cuu ban, duc ban
van lam » van nam
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, 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 tri ((nang xa) OR (nang ma)) hoi. hieu van lam ((cuc ban) OR (cua ban)) hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tri ((nang xa) OR (nang ma)) hoi. hieu van lam ((cuc ban) or (cua ban)) hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach tri ((nang xa) OR (nang ma)) hoi. hieu van lam ((cuc ban) or (cua ban)) hanh di cua tre*.