I used the official names, or at least what Wikipedia lists as official name: http://en.wikipedia.org/wiki/Ember.js , http://en.wikipedia.org/wiki/AngularJS. Adding "React" (Facebook's React) is even more difficult.

These kinds of searches are hard to get right. The name for the ember project is "ember", have a look at the website. The search term "ember" is too general though for comparison.

I guess the point is that google trends is often a bad metric.