Sorry you are having trouble with that. I could not recreate that problem. Do you see the Search tab on the Nutrition Tracker? If you click on that, what happens? If the Search field is just not showing up there still, clearing your cache and cookies might help. If you need help with how to do that, please refer to this Help answer for instructions: www.sparkpeople.com/community/help_answer.
You might also try using a different browser to see if it works better there.