Perhaps you should try some spelling variations:
ban hanh » ban hang
sach ky » sac ky, sach y, sach ty
hanh di » hanh vi, hanh de, hang di
xuc ban » duc ban, cuc ban, quoc ban
va cham » va chat, va tham
cuu tre » cua tre, cau tren, cau treo
nang so » nang som, nang co, nang ho
so hoa » do hoa, so ha
sai ky » sac ky
di cuu » di cau, di cua, dinh cuu
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sai ky)) nang so hoa. hieu ((va cam) OR (va cham)) xuc ban hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sai ky)) nang so hoa. hieu ((va cam) OR (va cham)) xuc ban hanh di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sai ky)) nang so hoa. hieu ((va cam) OR (va cham)) xuc ban hanh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sai ky)) nang so hoa. hieu ((va cam) OR (va cham)) xuc ban hanh di cuu tre*.