grope
search uncertainly for (a word or answer) in one's mind.
"she was groping for the words which would express what she thought"
grope for something
to try hard to find the right words to say or the right solution to a problem but without any real idea of how to do this
She hesitated, seeming to grope for words.
https://www.ldoceonline.com/dictionary/grope-...
to look for something blindly or uncertainly
grope for the right words
https://www.merriam-webster.com/dictionary/grope
look for somebody/something
1 to try to find something that you have lost, or someone who is not where they should be
SYN search for
I’m looking for Steve – have you seen him?
Detectives are still looking for the escaped prisoner.
https://www.ldoceonline.com/dictionary/look-for