Food Categories
By default, the Nutrition Tool omits fast foods, beverages, breakfast cereals, and some other food categories. My reasons for various category omissions are here You can change this behavior by clicking the "Categories" menu item.
Here, you can select whichever categories you wish you search through by clicking their checkboxes.
The categories menu item can be highly useful if you want to search through a specific set of foods, for example to find fruits with the highest amount of fiber you could unselect all, check "fruits and fruit juices" and then Rank By Fiber.