Sign in Office.com
At first, open office.com website, and click "Sign in" top right of web page.
After sign in Office.com, click "Install Office" button.
In Office 365 > Install web page, find and click "Language and install options".
After enter "Language and install options" web page, find and click "Additional install options".
In "Additional install options" web page, find "Other versions of Office".
You can find these versions list in version combo box:
Office 2013 - 32-bit
Office 2013 - 64-bit