Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban hanh » ban hang
hoc ban » hoc bang, hoc dan, hoc bai
vu kham » vu khanh
vu cham » va cham, tu cham, qua cham
mang xa » lang xa, mang may, dang xay
xang xa » lang xa, ang xa, dang xay
cua tre » cua te, cuu tre, cua triet
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: thuoc sach y ((xang xa) or (mang xa)) hoi. hieu ((vu cham) or (vu kham)) hoc ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y ((xang xa) OR (mang xa)) hoi. hieu ((vu cham) OR (vu kham)) hoc ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y ((xang xa) or (mang xa)) hoi. hieu ((vu cham) or (vu kham)) hoc ban hanh vi cua tre*.