Your will need to make use of your top tool search bar.
 

If you’re doing a general search, just type in what you’re looking for and click the magnifying glass icon, or press the ‘enter’ key on your keyboard.

If you’re looking for a vehicle to fit certain specifications, then click the word ‘Advanced’: using the checkboxes, you’ll now be able to specify whether you’d like to see only vehicles of a specific price, with a specific mileage, or a number of other requirements. 

Once you’ve created your search, you’ll see that the words you searched for appear below the search bar as search tags. If you want to start your search from the beginning again, just click on the words ‘Clear all tags’.