Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
dinh lai » dinh lam, dinh lap, dinh tai
sach ky » sac ky, sach y, sach ty
lai cua » dai cua, hai cua, lai chau
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu va » hieu qua
ro hai » co hai, o hai, so hai
so ha » so hoa, so va

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 ky nang ((ro hai) OR (so ha)). ((hieu va) OR (lieu va)) am thuc va dinh lai cua viet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ro hai) or (so ha)). ((hieu va) or (lieu va)) am thuc va dinh lai cua viet*.