Perhaps you should try some spelling variations:
ban hanh » ban hang
can ban » van ban, toan ban
vu cham » va cham, vu kham, tu cham
sach ty » sach y, sach thu, xach tay
ve cham » va cham, ve chat, ve chim
xang xa » lang xa, mang xa, ang xa
sach tu » sach thu, cach tu, sach uu
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: tu ((sach ty) or (sach tu)) xang xa hoi. hieu ((ve cham) or (vu cham)) can ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) xang xa hoi. hieu ((ve cham) OR (vu cham)) can ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) xang xa hoi. hieu ((ve cham) or (vu cham)) can ban hanh vi cua tre*.