When you first open this screen all items are listed and all categories are selected (all categories are highlighted), but you can narrow the search using categories and keywords.
Select an individual category by clicking on it. To select more than one category click on one category then hold down the Ctrl key and click the other categories you want to include.
You can also enter Keywords in the Search box but note that this searches the body of the advert only, not the title. People placing adverts should include the keywords in the body of the advert, as well as the title.
After narrowing your search, click on the Apply button.
CA members can create their own Ads. For help on this click here.