Perhaps you should try some spelling variations:
ban hanh » ban hang
sach ty » sach tu, sach thu, xach tay
cao hoa » cao hoat, cao khoa, cau hoa
xuc ban » duc ban, cuc ban, quoc ban
hanh ve » hanh vi, hanh va, hanh kem
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) OR (sach y)) nang cao hoa. lieu va cam xuc ban hanh ve ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ty) OR (sach y)) nang cao hoa. lieu va cam xuc ban hanh ve ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) OR (sach y)) nang cao hoa. lieu va cam xuc ban hanh ve ((cua tre) or (cuu tre))*.