Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sang mai » sang ma, sang tai, lang mai
thanh di » thanh doi, thanh de, thanh do
ky sang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
di cua » dai cua, doi cua, de cua
cua te » cua tu
xuc va » tuc va, luc va, xac va
ve cac » va cac, vien cac

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: thu sach ky sang mai hoi. hieu ((ve cac) OR (vien bach)) ((xuc va) OR (duc va)) thanh di cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky sang mai hoi. hieu ((ve cac) or (vien bach)) ((xuc va) OR (duc va)) thanh di cua te~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky sang mai hoi. hieu ((ve cac) or (vien bach)) ((xuc va) OR (duc va)) thanh di cua te*.