Perhaps you should try some spelling variations:
ban hanh » ban hang
sach kem » hanh kem
lang xa » lang ha, dang xay, lang van
xua ban » xuat ban, cua ban, qua ban
nam xua » nam cua, nam mua, nam qua
cua tre » cua te, cuu tre, cua triet
sach ky » sach y, sach ty, sach hay
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
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 ky) OR (sach kem))) or (sac ky)) lang xa hoi. lieu va nam xua ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach kem))) OR (sac ky)) lang xa hoi. lieu va nam xua ban hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach ky) OR (sach kem))) or (sac ky)) lang xa hoi. lieu va nam xua ban hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) OR (sach kem))) or (sac ky)) lang xa hoi. lieu va nam xua ban hanh vi cua tre*.