How do you search for a file of a **specific type** in OS X Yosemite?  I cannot seem to find any instructions on how to do this. 

In the Finder search I enter: `kind:zip`

But it returns **all** compressed files.  I only want zip files - so this [SO post][1] does not help me much.  All the solutions either use bash, or I cannot find the options they refer to.


Please advise.


  [1]: http://apple.stackexchange.com/questions/602/how-can-i-search-a-specific-type-of-file-in-mac