I'm sorry, I'm not familiar with the specific 'Hridayam full story'. It could be a story from a particular culture, book or movie. Maybe you can give more context about it.
Perhaps the situations and events in Hridayam are based on real - life scenarios. For example, if it involves career choices, family dynamics, or social interactions that are common in the real world, it can be considered a real story. It may also be that the story is inspired by someone's true life story, with all the complexity and nuances that come with real - life experiences.
I'm not very familiar with specific 'Malayalam Kambi Kathakal' stories. However, these are likely to be traditional or folk stories in the Malayalam language. You could try looking in local libraries in Kerala (where Malayalam is spoken) or searching for Malayalam literature collections online.
Kala is based on a true story. The filmmakers did extensive research to accurately depict the events and capture the essence of the real story behind it.
The Phoenix Malayalam movie is not based on a true story. It's a work of fiction crafted by the imagination of the filmmakers. They might have drawn inspiration from various sources, but it doesn't have a real-life basis.