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

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 van lam xuc va ((thanh di) OR (thanh doi)) 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 van lam xuc va ((thanh di) OR (thanh doi)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((tang xa) or (tang ma)) hoi. hieu van lam xuc va ((thanh di) OR (thanh doi)) cua tre*.