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
cuc ban » cua ban, cac ban, cuu ban
cuu tre » cua tre, cau tren, cau treo
xuc ban » duc ban, quoc ban, xuat ban
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma

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