Using the CINAHL Headings, do a broad subject search for Nursing Theory or Theoretical Nursing Models.
If you have a specific theory in mind, using the CINAHL Headings, select a specific model or theory such as Roy Adaptation Model or Watson's Theory of Caring.
Add a keyword to the search on your topic of interest. So if you are looking for articles on Orem's theory and patients with cancer, combine the CINAHL Headings of Orem Self-Care Model and Cancer Patients.
Do an author search for articles written by a specific theorist.