I'm assuming you're referring to the Thai movie "5 Samath" or more commonly known as "5 Senses" or in Thai "ห้า สะท้าน". It's a 2006 Thai psychological drama film directed by Jirayut Iamthong.
5 Samath was the 1291st film in Sinhala cinema and received mostly positive reviews for its authentic portrayal of rural life and its critique of the "scholarship exam culture". The film's lead child actor, , was recognized for his performance with a merit award at the 2018 Sarasaviya Awards . Where to Watch "5 Samath Full Movie" 5 samath full movie
You can find listing information and potential streaming availability on Justdial or via the Roopa Hala App , which specializes in Sinhala cinema. I'm assuming you're referring to the Thai movie