Being a student it's needless to say that you Google about different sorts of stuff at least 50 times a day. Sometimes to find out about different concepts or understand new words and sometimes for your assignments. It is very important that the source is reliable otherwise it can cause a huge problem. Here are the search engines that you can use to generate information-
WorldCat.org
This is one of the largest networks of online library-related content and services.
Semantic Scholar
This search engine is powered by the Allen Institute for Artificial Intelligence (AI). It is very efficient for data transmission.
Ecosia
This search engine runs on social principles. It deals with things mostly related to environmental issues and the revenue generated is used to plant trees and for cleanup drives.
Open Knowledge Maps
This browser works on visual-based learning instead of monotonous lines and information. It gives you a customized map that includes the 100 most relevant documents related to the topic of your search.
COnnecting REpositories (CORE)
It is a non-profit service with over 200 million articles from 11000 sources.
