I'm not sure specifically which 'dil na umeed to nahi' story you're referring to. It could be a very specific cultural, literary or personal story that I'm not familiar with. Maybe it's from a particular regional folklore or a new piece of media that hasn't gained widespread knowledge yet.
Your local libraries are also a great place to look for 'dil yeh ziddi hai complete novel'. Librarians can be very helpful in finding books, and they might be able to order it for you if they don't have it in stock already.
As I don't know the full story related to 'dil na umeed to nahi', I can't really explain the concept behind it in the context of the story. But generally, it could imply a state of the heart where there is no hope left. It might be about a character's emotional state in the story, whether it's due to a failed relationship, a difficult situation, or something else.
The story of 'dil se dil tak' likely revolves around relationships. It could involve the meeting, falling in love, and facing challenges in the relationship of the main characters. Maybe there are elements of family interference, personal insecurities, or misunderstandings that the characters have to overcome. Without having watched it in detail, it's hard to say exactly, but most such shows follow a pattern of exploring the various aspects of love and relationships.
The title 'dil akhir dil hai' gives an impression that it might revolve around the concept of the heart. It could be a story that delves deep into human emotions. It might be about a character who has been through various experiences that have shaped their heart. They could have faced love, loss, betrayal, and through all these, the story could be about how their heart remains a heart at the core, with all its vulnerabilities and strengths. However, without proper knowledge of the actual story, it's difficult to say for sure.
Since I haven't seen the full story of 'dil se dil tak', I can only assume it's a story about deep emotional connections between people, likely in the context of love, with the characters experiencing various emotions and situations that test their bond.