Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cua triet, dua tren
hanh va » hang va, hanh vi
sach ky » sac ky, sach y, sach ty
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
anh vi » hanh vi, anh va, anh ve
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu van cau xuc ban ((anh vi) or (hanh va)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoi. hieu van cau xuc ban ((anh vi) OR (hanh va)) ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoi. hieu van cau xuc ban ((anh vi) or (hanh va)) ((cua tre) or (cuu tre))*.