One of our chief goals with building Cardinal is to make it easy for people on a team to find the information they need, when they need it.
When you search in Cardinal, it is specific to the feed you are in, so if you want to search everything, make sure to open the Everything feed first.
You can click the # icon in the search bar to open a menu and filter to a specific label. You can also open click the More Filters icon next to the # icon to filter by watching, archived, and specific card types.
If you choose to filter by a specific card type, a set of options will appear to allow you to filter by any filterable fields in that card type. For example, if a custom card type includes a Date field, you can filter to cards that have that field set before or after a specific value.