Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
duoc gia » duoc giao, quoc gia, duc gia
thanh va » thanh van, hanh va, thanh ha
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
cua tu » cua tuc, cua su, cua cu

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: so ((sach ky) OR (sach ty)) lang xa hoi. hieu van nam duoc gia thanh va ((cua tre) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sach ty)) lang xa hoi. hieu van nam duoc gia thanh va ((cua tre) or (cua tu))~".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sach ty)) lang xa hoi. hieu van nam duoc gia thanh va ((cua tre) or (cua tu))*.