Solution Keywords: entering single words vs. phrases

Solution Keywords: entering single words vs. phrases

When entering key words, I understand that single words should be separated by a comma.
 
How should phrases be entered?
 
For example,  if I want the phrase "installation error" to be a "keyword" along with other words, should I enter it like this? 
 
installation, error, installation error
 
Thank you!

                  New to ADSelfService Plus?