If you're having trouble finding enough sources, you may need to broaden your topic and searches.
For example, instead of doing a search for "videogames and violence and teenagers," you could search for "videogames."
You'll also want to remove any limits that you've placed on your search (like date, publication type, etc.)
You may also need to try to think of your topic more broadly. For example, instead of looking for articles about Taylor Swift, you could look for articles about our country's obsession with celebrity, the cult of celebrity, etc.