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
xuc van » duc van, luc van, vuc van
su tien » su hien, tu tieng, dau tien
va bao » va bai
ban ve » ban va
x hoi » xa hoi, o hoi, x ho
kien » bien, vien, dien

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 tu nang x hoi. hieu ((va bao) or (va cac)) xuc van ban ve ((su tien) OR (su kien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang x hoi. hieu ((va bao) OR (va cac)) xuc van ban ve ((su tien) OR (su kien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang x hoi. hieu ((va bao) or (va cac)) xuc van ban ve ((su tien) OR (su kien))".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang x hoi. hieu ((va bao) or (va cac)) xuc van ban ve ((su tien) OR (su kien))*.