Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh hoc » thanh hoa, than hoc, thanh ho
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky

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

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