Perhaps you should try some spelling variations:
day thanh » dat thanh, da thanh, dam thanh
dao thanh » ban thanh, tro thanh, de thanh
toc sach » hoc sach, doc sach, thuoc sach
hoc cac » hoc cao
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
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: ((toc sach) or (hoc cac)) ky nang x hoi. lieu va nam thu ((day thanh) or (dao thanh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc cac)) ky nang x hoi. lieu va nam thu ((day thanh) OR (dao thanh)) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc cac)) ky nang x hoi. lieu va nam thu ((day thanh) or (dao thanh)) doi cua tre*.