There are several ways to find variables in the data set that are related to food. One possible approach would be to use the lookfor command:
lookfor food
The command above displays a list of variables that contain the word "food" either in the variable name itself or in the corresponding variable label. While this is an efficient method, it is possible that some variables related to food would not be identified. It is possible that a variable related to food may not have the word food in the variable name or the corresponding label.
A second approach would be to use the command describe:
describe
This command would display every variable and its corresponding label in the STATA Results window. Using this list, you could browse for anything related to food. While this approach will not miss variables without the word "food" in the name or label, it is relatively time consuming and tedious.