Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
sach ky » sac ky, sach y, sach ty
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
luc va » tuc va, loc va
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: hoc sach ky dang ma hoi. hieu ((ve cam) OR (ve cac)) ((duc va) OR (luc va)) thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky dang ma hoi. hieu ((ve cam) OR (ve cac)) ((duc va) or (luc va)) thanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky dang ma hoi. hieu ((ve cam) OR (ve cac)) ((duc va) or (luc va)) thanh vai cua tre*.