Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cuc ban » cua ban, cac ban, cuu ban
sach ky » sac ky, sach y, sach ty
xuc ban » duc ban, quoc ban, xuat ban
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua te » cua tu
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky lang xa hoi. hieu va cham ((xuc ban) or (cuc ban)) hanh vi ((cua te) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky lang xa hoi. hieu va cham ((xuc ban) OR (cuc ban)) hanh vi ((cua te) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: hoc sach ky lang xa hoi. hieu va cham ((xuc ban) or (cuc ban)) hanh vi ((cua te) or (cua su))*.