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

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) OR (dang xay)) hoi. hieu 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) OR (dang xay)) hoi. hieu va thanh hoc va hanh vi ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te san ky ((dang xa) OR (dang xay)) hoi. hieu va thanh hoc va hanh vi ((cua tre) or (cua triet))*.