Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hien cac » thien cac, vien cac, dien cac
hieu cac » hieu luc, hieu va, hieu van
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
dinh va » dinh van, dinh ve, tinh va
cua tre » cua te, cuu tre, dua tren
sai ky » sac ky
bao va » bao ve, tao va, ban va
tu sai » tu bai, tu san, tu cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) bao va dinh va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) bao va dinh va ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) bao va dinh va ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) bao va dinh va ((cua tre) or (cua triet))*.