When it comes to writing or expressing your thoughts, it's always good to have a wide variety of synonyms to choose from. If you're looking for alternatives to the phrase "concerned with," there are quite a few options that can be used to add some variety to your writing. Some of the potential synonyms that can be useful in this context include focused on, centered on, dealing with, related to, pertaining to, related to, connected to, associated with, and touching on. With these options in mind, you'll be well-equipped to vary your writing and express yourself in new and unique ways.