Наташа подошла к нему и спросила, ч

Наташа подошла к нему и спросила, что с ним. Он [князь Андрей] не ответил ей и, не понимая ее, посмотрел на нее странным взглядом.

Results (English) 1:

Natasha came to him and asked him. He [Prince Andrew] did not answer her and, without realizing it, looked at her strange look.

Results (English) 2:

Natasha went up to him and asked what happened to him. He [Prince Andrew] and did not answer her, not knowing her, looked at her a strange look.

Results (English) 3:

Natasha came to him and asked that, with him. He (the duke) has not responded to it, and not realizing it, looked at her curious eyes.