How do I exclude sites from a Google search?

Exclude sites from your search engine:

  1. From the control panel, select the search engine you want to edit.
  2. Click Setup from the menu on the left.
  3. In the Basics tab, click Advanced under Sites to Search to expand the Sites to exclude section.
  4. Click Add under Sites to exclude.

For More Information Please Refer: https://support.google.com/customsearch/answer/4513886?hl=en