I am working on 2 research papers. One is on the benefits of medical marijuana over opiates for pain management and the other is on personality
Answer
I recommend the following approaches to assist with your research.
1. Scan the bibliographies of the best articles you've collected and note down the most helpful sources the authors have used. You can then track down those pieces in the databases.
2. In the records for articles you encounter in the databases, examine the terms associated with the content. Follow those links to find more information. Note: In some cases, the author supplied terms are the most useful for finding relevant related material.
3. Access the controlled vocabulary in the databases and use it to construct your search. This approach yields more refined hits than a basic keyword search. In EBSCO, for example, you can access these terms through the Subjects menu option on the top left side of the search interface.
4. Shape your results by specifying peer reviewed articles and other helpful limiters (date range, etc.).