Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoa » cao hoat, cao khoa, cau hoa
xuc ban » cuc ban, quoc ban, xuat ban
duc ban » duc tan, duc van, dua ban
hanh va » hang va, hanh vi
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va cam » va cham, va cac, va cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang cao hoa. lieu va cam ((xuc ban) OR (duc ban)) hanh va ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang cao hoa. lieu va cam ((xuc ban) OR (duc ban)) hanh va ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang cao hoa. lieu va cam ((xuc ban) OR (duc ban)) hanh va ((cua tre) or (cuu tre))*.