Perhaps you should try some spelling variations:
sach hay » sach han, sach ha, sach nay
sach thu » sach thue, sach thieu, sach tham
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
cham so » cham soc, cham o, ham so
cua tre » cua te, cuu tre, cua triet
so ban » sao ban, so bang, co ban
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 hay) or (sach thu))) or (sach y)) nang xa hoi. hieu vu cham so ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach hay) OR (sach thu))) OR (sach y)) nang xa hoi. hieu vu cham so ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach hay) or (sach thu))) or (sach y)) nang xa hoi. hieu vu cham so ban hanh vi cua tre*.