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How can you SORT your results? Look at the options!
Sort by TIMES CITED to find keystone / foundational papers for your topic.
How can you FILTER? Can you choose just the peer review articles? Or just review articles (easier to read)?
See what keywords are assigned to each search result. Use these to refine your search terms.
Use the references cited to find more relevant articles.
If you see the same author name over and over, search by that author name.
How do your search terms match the terms in the papers? Are there any changes you should make to your search terms?