Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
van dinh » van minh, van dich, xuan dinh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va dinh » va kinh, va tinh, vu dinh
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang

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: thu sach y nang xa hoi. hieu ve pham duc ((va dinh) OR (van dinh)) vi ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu ve pham duc ((va dinh) or (van dinh)) vi ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu ve pham duc ((va dinh) or (van dinh)) vi ((cua tre) OR (cua triet))*.