Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, cua triet
qua ca » qua cac, qua cua, qua cai
xuc va » tuc va, luc va, xac va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang x hoi. hieu qua ca ((xuc va) or (duc va)) hanh ve ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu qua ca ((xuc va) OR (duc va)) hanh ve ((cua tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu qua ca ((xuc va) or (duc va)) hanh ve ((cua tre) or (va triet))*.