Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
va thai » van thai, va tai, va tham
den vay » den gay, den lay, den nay
danh vi » dinh vi, danh di, danh va
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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: so sach y nang ma hoi. lieu va thai den vay ((danh vi) OR (hanh vi)) cua viet~.
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. lieu va thai den vay ((danh vi) or (hanh vi)) cua viet*.