You can filter your contacts under the menu item Contacts. Click on Contact filter and select what your contacts should be filtered by under Field selection. Confirm you entry by clicking on Add. You can select as many fields as you like.
When determining the filter, you can not only use AND and OR; you can also exclude combinations.
An example: You want to see all contacts who received your email AND click the link, but did NOT buy the e-book. In the following video we show you how to implement such a criteria selection.