The phrase "exist from" can be synonymous with words such as "derive", "originate", "arise", "emanate", and "proceed". When we use these words, we are referring to the source or the place where something comes from. For example, we might say "The traditions of this particular community exist from their unique history and values." In this case, we could also use the word "derive." Similarly, we could say "The issues that arise in this workplace exist from a culture of miscommunication." Here, "arise" is used to describe the origin of the problems. Whatever the context, using synonyms can add variety and nuance to our speech and writing.