Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
cuu tre » cua tre, cau tren, cau treo
xuc ban » duc ban, cuc ban, quoc ban
van cam » van nam, van lam, van cau
anh vi » hanh vi, anh va, anh ve
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 van cam xuc ban ((anh vi) or (hanh va)) ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu van cam xuc ban ((anh vi) OR (hanh va)) ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu van cam xuc ban ((anh vi) or (hanh va)) ((dua tren) or (cuu tre))*.