Perhaps you should try some spelling variations:
thanh thuc » thanh thuy, nhanh thuc, thach thuc
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
te sach » toc sach
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
te ban » te bao
vi cua » vai cua, di cua
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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 (te ban)) ky nang ((x hoi) OR (o hoi)). hieu van thanh thuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (te ban)) ky nang ((x hoi) OR (o hoi)). hieu van thanh thuc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (te ban)) ky nang ((x hoi) OR (o hoi)). hieu van thanh thuc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (te ban)) ky nang ((x hoi) OR (o hoi)). hieu van thanh thuc va hanh vi cua tre*.