Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
bach thuc » cach thuc, bach thu, thach thuc
ban thanh » ban hanh, ban hang
thanh lam » thanh lap, hanh lam, thanh nam
thuc ban » thuoc ban, thuc dan, thu ban
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va bach » va cach, vu bach, va bac
lam cua » nam cua, lam chat
cua tre » cua te, cuu tre, cua triet
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 (thuoc sach)) ky nang x hoi. hieu va bach thuc ban thanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ky nang x hoi. hieu va bach thuc ban thanh lam cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ky nang x hoi. hieu va bach thuc ban thanh lam cua tre*.