Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
thanh doi » thanh loi, thanh moi, thanh do
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, nam thu, nam tu
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. hieu van ((nam thuc) or (am thuc)) day thanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. hieu van ((nam thuc) OR (am thuc)) day thanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu van ((nam thuc) or (am thuc)) day thanh doi cua tre*.