Search engines are supposed to be non sectarian and impartial. The best ones should offer, first of 
all, the most popular sites, as well as those more relevant to the topic being searched.
Google’s easy-to-use interface and personalized user experience comes at a cost. They are politically biased and go as far as to censor or push further back those not agreeing with their political views. I've confirmed this comparing their search results from other more relevant and impartial search engines.
Furthermore, it’s no secret the search engine giant catalogs the browsing habits of its users and shares that information with advertisers and other interested parties.
Bing is a superior non-biased search engine. In addition, Bing image search is superior to its Google rival’s and much more intuitive.
Swisscows is a unique option on my personal list, billing itself as a family-friendly semantic search engine. They also pride themselves in respecting users’ privacy, never collecting, storing or tracking data. It uses artificial intelligence to determine the context of a user’s query based on semantic data recognition that give faster "answers" to queries. In addition, Swisscows does not store users' data.
WebCrawler is the search engine with longer years of service. It is non invasive, practically free of advertising, and very intuitive as well on image search, thus very successfully purging the irrelevant garbage.
CC Search should be your first stop on the hunt for nearly any type of image, video or music copyright-free content that you either may "Use commercially" or "Modify or adapt".
This search engine is perfect if you need music for a video, an image for a blog post, or anything else without worrying about an angry artist coming after you for ripping off their work.
On the other hand, if you have a question and need an answer, Ask.com is the search engine for you. You may install the Ask.com toolbar in your browser, but it is not necessary and I do not recommend it. Just keep the link and use it when needed.
Try them and set yourself free!
However, there are many other options if for some reason these given here do not satisfy your requirements. Do not hesitate to look for them as well.