In order for these open-ended search fields to pull multiple criteria there is a specific naming convention that needs to be applied.
Let's say you were looking for keyword "Central Park" but also wanted to find the keywords of "Zoo" and "Bow Bridge". You would apply the following naming convention... (Central AND Park) OR (Zoo) OR (Bow AND Bridge).
Each individual keyword is contained inside parentheses.
Use the word "OR" to designate that the field does NOT need to include all of the keywords.
Use the word "AND" for keywords that are multiple words.