Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
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: ((((thuat sach) or (tu sach))) or (toc sach)) ky nang x hoi. hieu ve cac luc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((thuat sach) OR (tu sach))) OR (toc sach)) ky nang x hoi. hieu ve cac luc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((thuat sach) or (tu sach))) or (toc sach)) ky nang x hoi. hieu ve cac luc va hanh vai cua tre*.