Thesaurus. (Let's look for others terms for smell)
AND-- connect two or several terms
OR-- use synonymously
NOT -- use to eliminate
(Smell) AND (Taste Perception) AND (Eating Behavior)
(Eating Behavior) OR (Eating Disorder*)
(Smell) AND (Taste Perception) AND (Eating Behavior) NOT (Children)
Use quotation marks if you have too many hits.