Is it possible to go for postdoc or apply for a research project in an area not related to Ph.d.?

... topic after 5 years of Ph.D. if yes. How? please help or:... topic after 5 years of Ph.D. if yes. How? please help

... topic after 5 years of Ph.D. if yes. How? please help

or:... topic after 5 years of Ph.D. if yes. How? please help

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