Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky dang ((ma hoi) or (xa hoi)). hieu ve cac duc va danh vi ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky dang ((ma hoi) OR (xa hoi)). hieu ve cac duc va danh vi ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: so sanh ky dang ((ma hoi) or (xa hoi)). hieu ve cac duc va danh vi ((cua viet) or (cua vat))*.