Perhaps you should try some spelling variations:
cua viet » hoa viet, cua vat, cua dieu
ca viet » va viet, co viet, hoa viet
tinh vi » trinh vi, tinh voi, tinh va
so sach » so sanh, bo sach, co sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
loc may » hoc may, loc mau, loai may
so sac » so dac
ve cac » va cac, vien cac

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 sac) OR (so sach)) ky dang xa hoi. hieu ve cac loc may tinh vi ((cua viet) OR (ca viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sac) OR (so sach)) ky dang xa hoi. hieu ve cac loc may tinh vi ((cua viet) or (ca viet))~".
• Adding a wildcard symbol may retrieve word variants: ((so sac) OR (so sach)) ky dang xa hoi. hieu ve cac loc may tinh vi ((cua viet) or (ca viet))*.