In the beginning of this stage all corner pieces of the up face should be in their places but they can be turned wrong.
In the end of this stage the cube should be done completely.
This sequence should be repeated till the right piece of up face won't be located correctly. At the same time the piece can "break". Don't be scared. After repeating this procedure few times, everything will return to their places. Before doing this, locate the second "wrong" piece to the right corner. Depending on the case, you should rotate upper face necessary amount of times to locate "wrong" piece on the right corner.
Now carry out this procedure to make this piece rotate correctly.
In the end you should complete your cube!
If you solve cube, press this I solved the Rubik's cube!