On the screen to add foods, there is a green bar at the top that has Search, Recent, Favorite, Food Grouping and Scan. Not all of these will not be visible on the screen at the same time. Those boxes scroll horizontally. So to perform a general search, swipe the green top bar to show the left-most "Search" button. Tapping on the Search button will allow you to perform a general food search. Hope this helps!
"We either make ourselves happy or miserable. The amount of work is the same." Carlos Castaneda
Live Kind. Laugh Often. Love Always.