Voldemort tried his best to survive the Harry Potter movies, with some horrifying dark magic. If you want to know how he did it, check out Horcruxes explained.
If Snape was a good guy, why didn't he tell Dumbledore that Voldemort had made a Horcrux with Slytherin's locket? - Quora
Horcrux, Harry Potter Wiki
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Horcrux, Harry Potter Wiki