Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, tu cach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
lang ha » long ha
lang xa » dang xay, lang van
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ly ((lang xa) OR (lang ha)) hoi. hieu va cao duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ly ((lang xa) OR (lang ha)) hoi. hieu va cao duc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ly ((lang xa) OR (lang ha)) hoi. hieu va cao duc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ly ((lang xa) OR (lang ha)) hoi. hieu va cao duc va hanh vai cua tre*.