Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cua triet, dua tren
hanh ve » hanh vi, hanh va, hanh kem
cuu tre » cau tren, cau treo
duc ban » duc tan, duc van, duc man
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
va lam » van lam, va lap

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: tu sach y nang xa hoi. hieu va lam ((duc ban) OR (dua ban)) hanh ve ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu va lam ((duc ban) OR (dua ban)) hanh ve ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu va lam ((duc ban) OR (dua ban)) hanh ve ((cua tre) or (cuu tre))*.