This is not a replacement for actual search engine, but I use this userscript and I love it. https://greasyfork.org/en/scripts/1682-google-hit-hider-by-domain-

This is not a replacement for actual search engine, but I use this userscript and I love it. https://greasyfork.org/en/scripts/1682-google-hit-hider-by-domain-search-filter-block-sites https://greasyfork.org/en/scripts/1682-google-hit-hider-by-d...