Perhaps you should try some spelling variations:
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 sanh ky lang xa hoi. ((hieu ve) OR (hieu va)) cac duc ((va hanh) OR (va danh)) vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky lang xa hoi. ((hieu ve) OR (hieu va)) cac duc ((va hanh) or (va danh)) vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sanh ky lang xa hoi. ((hieu ve) OR (hieu va)) cac duc ((va hanh) or (va danh)) vi cua tre*.