Perhaps you should try some spelling variations:
ban banh » ban hanh, ban anh, ban danh
banh hoi » binh hoi, hanh thoi, benh hoc
sach ty » sach y, sach tu, sach thu
xay hoi » tay hoi, cay phoi, gay thoi
hieu va » lieu va, hieu qua
hoi cua » hoi chuc
cua tre » cua te, cuu tre, cua triet
du ban » dua ban, duc ban, du bao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (cac ky)) dang ((xay hoi) or (xa hoi)). hieu va cac du ban banh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (cac ky)) dang ((xay hoi) OR (xa hoi)). hieu va cac du ban banh hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (cac ky)) dang ((xay hoi) or (xa hoi)). hieu va cac du ban banh hoi cua tre*.