Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
sach ky » sach y, sach ty, sach kem
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc 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: su ((sach ky) OR (sac ky)) lang xa hoi. ((hieu ve) OR (hieu va)) coc luc va thanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sac ky)) lang xa hoi. ((hieu ve) or (hieu va)) coc luc va thanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sac ky)) lang xa hoi. ((hieu ve) or (hieu va)) coc luc va thanh vi cua triet*.