Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
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: tu sach ty ((lang xa) OR (nang x)) hoi. hieu ((ve cac) OR (va cham)) hoc va hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((lang xa) or (nang x)) hoi. hieu ((ve cac) or (va cham)) hoc va hanh vi cua tre*.