Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
soc van » hoc van, sac van, soc dan
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
oc van » hoc van, luoc van, quoc van
anh vi » hanh vi, anh va, anh ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. lieu va cham ((soc van) OR (oc van)) anh vi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. lieu va cham ((soc van) OR (oc van)) anh vi ((cuu tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. lieu va cham ((soc van) OR (oc van)) anh vi ((cuu tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. lieu va cham ((soc van) OR (oc van)) anh vi ((cuu tre) or (cua triet))*.