How to use it to search for a substring(or nearly it) in a large blob of text?

[ishandutta2007]

For example in the following text:

Easier to reason about useMemo can make your code easier to reason about by making it clear which values are being calculated and when.
Follow-up questions
What are some other ways to improve the performance of React applications?

I want to locate and split by sting like : Follow-up questions, Follow-up questions:, Follow-up question, Followup questions , Follow-up questions=, follow-up questions:= .
I know searching by regex is an option by I am looking to explore levenshtein to keep room for an unexpected letter.