Below is a comprehensive list of better search engines to use for research than Google. Remember that as Google has worked to overtake the internet, its search algorithm has gotten worse and it has been designed to prioritize advertisers and popular pages.
Here are the website links:
www.refseek.com
www.worldcat.org
https://link.springer.com
www.bioline.org.br
http://repec.org
www.science.gov
www.pdfdrive.com
www.base-search.net
Also consider for search engines:
www.ecosia.org (plants a tree for every search)
www.lilo.org (protects your data, funds personal projects – about environment, human rights, animal rights)
www.qwant.com (doesn’t track your searches and doesn’t sell data)
You may want to use this version of the list instead as it is both more expansive and doesn’t have the facebook ref links.
https://www.tumblr.com/s-n-arly/697929770215899136/skip-google-for-research
a good generalized search engine is duckduckgo. the same keywords get the same result every time, and if you pair it with brave browser, you also skip the ads and the tracking