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