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")