Technology companies should work on tools to disrupt terrorism - such as creating a hate speech "spell-checker" - Google`s chairman Eric Schmidt has said.Writing in the New York Times, Mr Schmidt said using technology to automatically filter-out extremist material would "de-escalate tensions on social media" and "remove videos before they spread".His essay comes as presidential hopeful Hillary Clinton again called on Silicon Valley to help tackle terrorism, specifically seeking tools to combat the so-called Islamic State."We need to put the great disrupters at work at disrupting ISIS," she said during a speech in Washington DC.In the wake of the Paris attacks, companies and governments have clashed over how to handle the terrorism threat.Many tech firms, buoyed by the fallout from the Edward Snowden leaks, have stood firm on encryption - with the likes of Apple and others making it near-impossible to access a locked smartphone without the password, a move that has frustrated some politicians. -BBC