Perhaps you should try some spelling variations:
sang tao » hang tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
va daoh » va danh, va doanh
lai cua » hai cua, lai chau, thai cua
va dao » ca dao

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 ky sang tao hoi. hieu va cac duc ((va daoh) or (va dao)) ((lai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang tao hoi. hieu va cac duc ((va daoh) OR (va dao)) ((lai cua) OR (dai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang tao hoi. hieu va cac duc ((va daoh) or (va dao)) ((lai cua) OR (dai cua)) tre*".