You can download the Office 2013 trial edition from Microsoft wesite. This is the full list and contains all languages avaialable for download.
Note that the next direct links are only for Professional Plus version. To get others visit the full list
DOWNLOAD OFFICE BELOW
English - 32bits 64bits
Activating Office 2013 Professional Plus and other versions
Download the activator here form my DropBox (tested last time 29-09-2013)
First you have to run the Setup file. This will install the activator.
DOWNLOAD OFFICE 2013 ACTIVATOR
Copy the password ans past it. Click in the button Next
Finally click Finish
Now, in Windows 8, go to the Start Manu and look for the KMSnano file. Execute it. It requires administrator privileges. In the Windows 7 (remember that Office 15 only runs in Windows 8.1, 8 and 7) go to the Start Menu, look for the folder KMSnano and then run the file named as KMSnano. Now it is running, you will have to wait till it close automatically. You can see in your taskbar the icon of KMSnano. When it dissapears it´s done.
Your office is now activated.