well, if you used the code i supplied before, you would not be able to do that
the search is configured to use a space as the OR separator:
RED CAR would search:
WHERE column LIKE '%RED%' OR column LIKE '%CAR%'
it uses ", " (coma followed by a space) as the and separator:
RED, CAR Would search:
WHERE column LIKE '%RED%' AND column LIKE '%CAR%'
if you force quotes around all search strings, you loose that flexibility, which is why I suggested an FAQ entry to explain the full string search as a better alternative.
If you dont modify the code, you can do fairly complex searches like:
"RED CAR", "WHITE TRIM"
this would search for
WHERE column LIKE '%RED CAR%' AND column LIKE '%WHITE TRIM%'