APA PsycInfo will not only allow you to limit to Scholarly (Peer Reviewed) Journals, but within the Methodology options you can limit to EMPIRICAL STUDY or more specifically to either a QUALITATIVE STUDY or a QUANTITATIVE STUDY.
Google Scholar returns articles based on relevancy - for instance - how many times the article has been cited by others, how many times your search terms show up in the article, whether your search term shows up in the title. While this helps find both focused and important research - your initial results may only include older articles.
You can adjust your Google Scholar search results so that you receive newer articles and more recent research. To do this, first search Google Scholar. Then after you receive your results use either the "Since" or "Sort by date" options on the upper-left hand side of the results page.
To learn more about using quotes and the intitle: command visit Advanced Research Techniques: Google Scholar