Search asks USDA and Open Food Facts. Curated whole foods rank above label submissions, and an entry that merely CONTAINS your food ranks below the food itself, which is why "oatmeal" doesn't lead with oatmeal bread.
Type the cut or the form if you know it. "Chicken" is a genuinely ambiguous question; "chicken thigh" is not.
A food you'll eat again belongs in Your foods. Log it once and it moves up on its own, or swipe right on a spoken meal's row to keep that reading permanently.
Correcting a food from Your foods sticks. Change the numbers and either log it, or Save without logging if you only came to fix it.