Perhaps you should try some spelling variations:
tang van » dang van, hoang van, trong van
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
dao duc » giao duc, tao duoc
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
ky tang » ky nang, ky dang, kho tang
hieu va » lieu va
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky tang van hoa. ((hieu va) OR (hieu qua)) dao duc ((va dinh) or (va thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang van hoa. ((hieu va) OR (hieu qua)) dao duc ((va dinh) OR (va thanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang van hoa. ((hieu va) OR (hieu qua)) dao duc ((va dinh) or (va thanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang van hoa. ((hieu va) OR (hieu qua)) dao duc ((va dinh) or (va thanh)) vai cua tre*.