Google provides an advanced search option which will help you refine your search to more relevant results. To get there just type in "advanced search" in Google.
Since sites with the .gov and .edu domains must meet certain criteria to be published with these domains, they tend to be more credible.You can limit your search within these domains by typing your search terms, then space, then "site:.gov" or "site:.edu"
Or search within a particular web site:
Google Scholar provides a search of scholarly literature.
Note that not all articles on Google Scholar are free, so if you find a good article, search the Library's databases where you can get it for FREE.
You can also request items from other college libraries by filling out the Interlibrary Loan (ILL) Request form.
Google is not the only search engine! Whhhuuutttt??!! It's true! Try out some of these other search engines to get different results.