Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
va nang » van nang, da nang, cam nang
hieu va » lieu va
sach va » sach xa, sach ha, sach dao
xuc cam » phuc cam
xuc ca » xuc cua
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua

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: toc sach va nang xa hoi. ((hieu va) OR (hieu qua)) cam ((xuc ca) OR (xuc cam)) dan vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach va nang xa hoi. ((hieu va) or (hieu qua)) cam ((xuc ca) OR (xuc cam)) dan vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: toc sach va nang xa hoi. ((hieu va) or (hieu qua)) cam ((xuc ca) OR (xuc cam)) dan vi cua triet*.