Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
va pham » van pham, va phat, va phan
va phap » va phat, ban phap
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
vi cua » di cua
x hoi » xa hoi, o hoi, x ho

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 tu nang x hoi. hieu ((va pham) OR (va phap)) duc va danh ((vi cua) OR (vai cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang x hoi. hieu ((va pham) or (va phap)) duc va danh ((vi cua) or (vai cua)) tre*.