Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lai » thanh hai, thanh lap, thanh loi
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hieu ve » hieu va, hieu van
lai cua » dai cua, hai cua, lai chau
dua ban » dia ban, cua ban, qua ban
cam dua » ca dua, cay dua, chay dua
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa

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: ((te sach) OR (((toc sach) OR (hoc sach)))) ky nang ma hoi. hieu ve cam dua ban thanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (((toc sach) OR (hoc sach)))) ky nang ma hoi. hieu ve cam dua ban thanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (((toc sach) OR (hoc sach)))) ky nang ma hoi. hieu ve cam dua ban thanh lai cua tre*.