Perhaps you should try some spelling variations:
ban danh » ban doanh, ban hanh, ban dan
sach kem » hanh kem
danh vi » hanh vi, dinh vi, danh di
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cao, va cai
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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 kem) or (sac ky)) lang xa hoi. hieu ((va cam) OR (va cac)) cua ban danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sac ky)) lang xa hoi. hieu ((va cam) OR (va cac)) cua ban danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach kem) or (sac ky)) lang xa hoi. hieu ((va cam) OR (va cac)) cua ban danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) lang xa hoi. hieu ((va cam) OR (va cac)) cua ban danh vi cua tre*.