There is no point in looking for him.
彼を捜してもむだだ
There is no probability 「of his succeeding [that he will succeed].
彼が成功する見込みはまったくない
There is no proof that ....
…という証拠はない
There is no prospect of living a normal life.
通常の生活が送れる見込みはない
There is no question that ....
…ということに何ら疑いはない
There is no real reason to worry about it.
それはまったく心配するに及ばない
There is no royal road to learning.
((諺))学問に王道なし
There is no rule but has some exceptions.
例外のない規則はない
There is no rule without exceptions.
例外のない規則はない
There is no saying when this could start.
これがいつ始まるかはわからない