Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
dinh te » kinh te, dinh ve, dinh tu
truc va » thuc va, thuc vat, trung va
sach cu » sach cua, sach uu, sach xu
lang xa » lang ha, dang xay, lang van
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cuu tre, cua triet

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: te ((sach cu) OR (sach tu)) lang xa hoi. hieu van cham truc va ((dinh te) OR (dich te)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach cu) OR (sach tu)) lang xa hoi. hieu van cham truc va ((dinh te) or (dich te)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach cu) OR (sach tu)) lang xa hoi. hieu van cham truc va ((dinh te) or (dich te)) cua tre*.