Finding the task/card you need could be accomplished in 2 ways.
1. You can open a project and press J to "jump to task". This will open a modal and you can start typing and press enter when you find the item you are looking for.
2. You can filter project tasks. In the sidebar, there is an input that you can use to filter tasks by name, id, assignee, type, status, milestone and label. If you know that item name you can just start typing it and it will be the only item left. However, It might be in a different list so pay attention to your lists when in list view mode.