Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tan banh » tan binh, ban banh, tang binh
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
banh vi » hanh vi, ban vi, benh vi
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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: tu ((sach ty) OR (sach y)) nang xa hoi. hieu van lam duc tan banh vi ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) nang xa hoi. hieu van lam duc tan banh vi ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach y)) nang xa hoi. hieu van lam duc tan banh vi ((cua tre) or (cua te))*.