Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
nang ji » nang si, nang noi, nang tai
tu sach » thu sach, su sach, te sach
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 tu, cac tac
va nang » van nang, da nang, cam nang
tu sac » tu cac, tu san, tu bac
tuc va » thuc va, truc va, tuc xa
ve cac » va cac, vien cac

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) OR (tu sach)) ky lang xa hoi. hieu ve cac tuc va nang ji ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky lang xa hoi. hieu ve cac tuc va nang ji ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky lang xa hoi. hieu ve cac tuc va nang ji ((cua triet) or (cua viet))*.