Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » dieu hien, chieu chien, dieu khien
bieu hien » dieu hien, dieu khien, bien phien
nang xa » nang x, lang xa, nang ma
cac bao » cach bao, cac bai, cac ban
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) OR (bieu hien)) 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) OR (bieu hien)) 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) OR (bieu hien)) 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) OR (bieu hien)) cac bao va dinh va ((cua tre) or (cua triet))*.