Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
hieu hieu » hien hieu, hieu hien, thien hieu
va triet » va thiet, va trien, ve triet
hieu cac » hieu luc, hieu va, hieu van
van dinh » van minh, van dich, va dinh
cac bao » cach bao, cac bai, cac ban
bao van » dao van, cao van, hao van
dinh va » dinh van, dinh ve, tinh va
cua tre » cua te, cuu tre, dua tren
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

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