Fetching details from the dictionary...

groping (for); fumbling around (for); searching (for an answer, solution, etc.); trying to find
停電で真っ暗な廊下の中を摸索しながら進んだ。
I groped my way forward through the pitch-dark hallway during the blackout.
新しい解決策を摸索する必要がある。
We need to search for a new solution.
彼女は暗い部屋で手探りをしながら鍵を摸索した。
She fumbled around for the key by feel in the dark room.