Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
phau hoc » phap hoc, thai hoc, nha hoc
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
hieu su » hieu sau, tieu su, hieu so
su phau » sau phau, su pham, su phat
hoc van » hoc dan, hoc va, hoc vat
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: ((thu sach) or (te sach)) ky nang x hoi. hieu su phau hoc van hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky nang x hoi. hieu su phau hoc van hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ky nang x hoi. hieu su phau hoc van hanh dai cua tre*.