Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu va » lieu va, hieu qua
nang ji » nang si, nang noi, nang tai
va nang » van nang, da nang, cam nang
cac tac » cac toc, cac bac, cac dac
cac tuc » cac toc, cac tu, cac nuoc
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ji cua » di cua
tu sac » tu sach, tu cac, 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: tu sac ky lang xa hoi. ((hieu ve) OR (hieu va)) ((cac tuc) OR (cac tac)) va nang ji cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. ((hieu ve) OR (hieu va)) ((cac tuc) or (cac tac)) va nang ji cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. ((hieu ve) OR (hieu va)) ((cac tuc) or (cac tac)) va nang ji cua triet*.