Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
tu sach » su sach, tu cach, vu sach
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
cac so » cac co, cac bo, cac ho
so van » su van, vo van
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: ((((tu sach) or (thu sach))) or (te sach)) ky nang x hoi. hieu ve cac so van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (te sach)) ky nang x hoi. hieu ve cac so van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (thu sach))) or (te sach)) ky nang x hoi. hieu ve cac so van hanh vai cua tre*.