Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
sach ky » sach ty, sach kem, sach hay
cuc ban » cua ban, cac ban, cuu ban
cac cuc » cac cuoc, cac cua, cac nuoc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
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 y))) or (sac ky)) nang xa hoi. hieu ve cac cuc ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach y))) OR (sac ky)) nang xa hoi. hieu ve cac cuc ban thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) or (sach y))) or (sac ky)) nang xa hoi. hieu ve cac cuc ban thanh vi cua tre*.