Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
thanh di » thanh doi, thanh do, thanh dinh
su sach » so sach, vu sach
xuc gia » duc gia, luc gia, tuc gia
lam xuc » cam xuc, lam duoc
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
tang xa » trang xa, lang xa, tang ha
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
va lam » van lam, va lap

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 ky ((tang xa) OR (tang ma)) hoi. hieu va lam xuc gia ((thanh di) OR (thanh de)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((tang xa) or (tang ma)) hoi. hieu va lam xuc gia ((thanh di) OR (thanh de)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((tang xa) or (tang ma)) hoi. hieu va lam xuc gia ((thanh di) OR (thanh de)) cua tre*.