Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, dua tren
nang o » nang co, nang ho, nang ro
qua ca » qua cac, qua cua, qua cai
xuc va » tuc va, luc va, xac va
o hoi » co hoi, o hoc, o hai

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