Google Scholar searches for references to scholarly articles and research papers on the open internet. Google Scholar can be a helpful tool, but it's very important to remember that Google Scholar is not going to provide you with access to the vast majority of high quality, evidence based, peer reviewed research article.
In Google Scholar, sometimes the full text is posted online and linked, other times users will see a "Find It at Sac State" option next to the Google Scholar listing. Follow these instructions to configure Google Scholar to display the "Find It at Sac State" link. Except for the most simple queries, using Google Scholar Advanced Search is recommended.