Perhaps you should try some spelling variations:
cua viet » hoa viet, cua vat, cua dieu
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
van cac » van hac, van cau, van bac
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
ca viet » va viet, co viet, hoa viet

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 xa) OR (lang xa)) hoi. hieu van cac duc va hanh vai ((cua viet) OR (ca viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) or (lang xa)) hoi. hieu van cac duc va hanh vai ((cua viet) OR (ca viet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (lang xa)) hoi. hieu van cac duc va hanh vai ((cua viet) OR (ca viet))*.