When you use search engines such as Google, you are searching the "surface web" or "open web." For your Literature Search assignment you can use any non-Google Scholar search engine, such as those shown below. To make the best of your search review the search tips provided.
When you retrieve results from a search engine look for websites that end in one of the following:
.gov = a government entity
.org = an organization
.edu = an educational institution
Websites that have one of these endings are likely reliable sources of information.