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