Listen to Onnaman Kochu Thumbi online. Onnaman Kochu Thumbi is a Malayalam language song and is sung by Ambili and Sreelatha. Onnaman Kochu Thumbi, from the album Thacholi Marumakan Chandu, was released in the year 1974. The duration of the song is 1:13. Download Malayalam songs online from JioSaavn.