不管他想什么办法，都没法把那箱子打开。

Try as he might, he couldn't open the box.

youdao

不管他想什么办法，都没法打开那个箱子。

Try as he might, he couldn't the box.

youdao

我才不管他怎么想呢。

I don't care what he thinks.

《牛津词典》

I'll be wondering what on earth is Pepsi up to, but that's fine.

我会疑惑百事究竟想干嘛,但不管他了

耶鲁公开课 - 博弈论课程节选