Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
te sach » toc sach
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
cao tuc » dao tuc, cao suc, cao toc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang

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 y lang xa hoi. hieu va ((cao tuc) OR (cao duc)) gia ((hanh vi) or (thanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. hieu va ((cao tuc) OR (cao duc)) gia ((hanh vi) OR (thanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y lang xa hoi. hieu va ((cao tuc) OR (cao duc)) gia ((hanh vi) or (thanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. hieu va ((cao tuc) OR (cao duc)) gia ((hanh vi) or (thanh va)) cua tre*.