Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
toc sach » hoc sach, doc sach, thuoc sach
pham soc » cham soc, pham ngoc, pham sach
hanh dai » hanh tai, hanh dao, vanh dai
hieu su » hieu sau, tieu su, hieu so
su pham » san pham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
soc va » hoc va, loc va, doc 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: ((thu sach) or (toc sach)) ky nang x hoi. hieu su pham soc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (toc sach)) ky nang x hoi. hieu su pham soc va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (toc sach)) ky nang x hoi. hieu su pham soc va hanh dai cua tre*.