Perhaps you should try some spelling variations:
"some occasional supplement" » "some educational supplement", "some occasional punishment", "some occasional retirement"
"some additional supplement" » "some additional settlement", "some nutritional supplement", "some educational supplement"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"some occasional supplement\") OR (\"some additional supplement\"))".
• Removing quotes may allow a broader search: (( some occasional supplement ) OR ( some additional supplement )).
• Adding a wildcard symbol may retrieve word variants: (("some occasional supplement") OR ("some additional supplement"))*.