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

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)) ky ((nang ma) OR (sang 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)) ky ((nang ma) OR (sang ma)) hoi. hieu ve cam dua ban thanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky ((nang ma) OR (sang ma)) hoi. hieu ve cam dua ban thanh lai cua tre*.