Perhaps you should try some spelling variations:
thanh tue » thanh tu, thanh hue, thanh tuu
buoc ban » buon ban, duoc ban, thuoc ban
quoc ban » quoc bao, quoc lan, quoc quan
te sach » toc sach
hoc cac » hoc cao
hieu te » hieu ve, hien te, hieu he
tue cua » te cua
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: ((te sach) or (hoc cac)) ky nang x hoi. hieu te hoc ((buoc ban) or (quoc ban)) thanh tue cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc cac)) ky nang x hoi. hieu te hoc ((buoc ban) OR (quoc ban)) thanh tue cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc cac)) ky nang x hoi. hieu te hoc ((buoc ban) or (quoc ban)) thanh tue cua tre*.