I am having a hard time understanding why some keywords in fields that are marked as "Use this field’s values as search keywords" are not showing in the results but others are. For example, I have a field in one entry that contains words like "batman, superman, spiderman". When I search for some of those terms, it shows the entry is shown. Now on a separate entry, the same field but with these keywords "mickey, donald, goofy". When I search those terms, no results are displayed.
How is it possible that one entry's keywords yield results, but the other entry's keywords do not?