It might well be true, but the details of the VICE story (one email from Snowden asking a question about whether a training programme was correct in asserting that executive orders were equivalent to acts of congress, and a belatedly acknowledged meeting with a compliance trainer which the compliance trainer says consisted of Snowden complaining about "trick questions" ) don't really back up the clickbaity headline...
(my clickbaity headline would be "NSA appears to lack competence at searching its own email")
(my clickbaity headline would be "NSA appears to lack competence at searching its own email")