When searching in the library databases, there are a few things you can do to remove many non- empirical articles from your results.
First, use the Scholarly or Peer-Reviewed filter. You can find this filter in the advanced search page or in the filter / limiter panel of most databases
Some databases, like ERIC, have an additional filter you can use to limit your results. On the Advanced Search screen, choose Reports—Research in the Publication Type box to help limit to research articles:
Additionally, you can add one or more of the following keywords to your search to help filter out unwanted results:
You might want to try a few different combinations. See what works best for your topic. Remember, you can link the terms with OR to tell the database to search for any one of them: (study OR empirical OR methodology)
Although the steps listed above will help to weed out a lot of the non-empirical articles, they won’t catch everything, so you’ll need to know how to recognize an empirical article.