Perhaps you should try some spelling variations:
te sach » toc sach
hanh va » hang va
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nano, tu lang
tu nong » tu dong, tu cong, tu tong
cuu tre » cua tre, cau tren, cau treo
va cao » va cac, va co, va dao
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 ((tu nang) or (tu nong)) x hoi. hieu va cao duc va ((hanh va) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tu nong)) x hoi. hieu va cao duc va ((hanh va) OR (hanh vi)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (tu nong)) x hoi. hieu va cao duc va ((hanh va) or (hanh vi)) cuu tre*.