Glen at the Hiddenness of Blog has gone through the trouble of locating all the portions of the Church Dogmatics that are available on Google Books. While the entire text isn’t accessible, a great deal of it can be found there.
The Doctrine of the World of God.
Vol. I/1 – Vol. I/2
The Doctrine of God.
Vol. II/1 – Vol. II/2
The Doctrine of Creation.
Vol. III/1 – Vol. III/2 – Vol. III/3 – Vol. III/4
The Doctrine of Reconciliation.
Vol. IV/1 – Vol. IV/2 – Vol. IV/3.2 – Vol. IV/3.1 – Index.
(HT: Christians in Context)