Research is a cyclical process.
As you learn more about your topic, you'll come across relevant words and phrases that you didn't think to search for the first time.
For some topics, you might find relevant information in consumer product information databases. Many of these are sponsored by consumer advocacy organizations, and others are run by government agencies.
Explore these websites have lots of information about health-related social problems.
These will help you learn more about your topic and will lead you to other sources.
These are general reference sources that cover a wide variety of topics, including health care.