Perhaps you should try some spelling variations:
ban tinh » ban thanh, quan tinh, ban hanh
sach ky » sach y, sach kem, sach hay
tinh vi » trinh vi, tinh voi, tinh va
cac ban » cac dan, cac van, can ban
nam cac » nam cao, nam sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
ve nam » he nam, va nam, le nam
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 ty))) or (sac ky)) lang xa hoi. hieu ve nam cac ban tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach ty))) OR (sac ky)) lang xa hoi. hieu ve nam cac ban tinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) or (sach ty))) or (sac ky)) lang xa hoi. hieu ve nam cac ban tinh vi cua tre*.