There has been lots of internet searches, but Googling isn't the same kind of research as laboratory experiments. Googling, in fact, returns the polar opposite of scientific research, as it suffers from the siloing effect of Net search algorithms whereas the peer review process filters the silo effect out. There have been precisely zero peer reviewed papers which survived peer review in authoritative journals detailing NDEs where researchers were able to affirm that the results could not be accounted for by activity within the brain..