Google Scholar is the scientific branch of the Google search engine. Google Scholar gives you access to free, open access scientific information. The web address is www.scholar.google.com. Use the 'regular' Google to orientate yourself on your topic and then switch to HANQuest in combination with Google Scholar.
When you add the HAN linker under settings in Google Scholar you can see next to your search result whether you can get to the full text of the article via HAN! You can also add the Radboud linker here to see if Radboud University has the full-text article.