Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
lang xa » lang ha, dang xay, lang van
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y ((((lang xa) OR (nang x))) OR (sang ma)) hoi. hieu ve pham duc va danh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: hoc sach y ((((lang xa) or (nang x))) or (sang ma)) hoi. hieu ve pham duc va danh vi cua tre*.