Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cua triet, dua tren
hanh va » hang va, hanh vi
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach ty
xuc ban » duc ban, quoc ban, xuat ban
van cam » van nam, van lam, van cau
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 cam ((xuc ban) OR (cuc ban)) hanh va ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van cam ((xuc ban) OR (cuc ban)) hanh va ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu van cam ((xuc ban) OR (cuc ban)) hanh va ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van cam ((xuc ban) OR (cuc ban)) hanh va ((cua tre) or (cuu tre))*.