Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
su sach » so sach, vu sach
thi van » thi hanh, thi nang
thi lan » thi hanh, thi nang, thi lien
dan ban » van ban, can ban, dan ba
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (ky nang)) x hoi. ((thi van) OR (thi lan)) cac dan ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) x hoi. ((thi van) OR (thi lan)) cac dan ban thanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (ky nang)) x hoi. ((thi van) OR (thi lan)) cac dan ban thanh vai cua tre*".