Perhaps you should try some spelling variations:
educational supplement » education supplementary, educational improvement, educational equipment
occasional supplement » occasional punishment
occasional retirement » personal retirement, additional retirement, occasional punishment
additional supplement » additional settlement, nutritional supplement, additional supplies

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

• If you are trying to use Boolean operators, they must be ALL CAPS: some ((((occasional supplement) OR (occasional retirement))) OR (((additional supplement) OR (educational supplement)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "some ((((occasional supplement) or (occasional retirement))) or (((additional supplement) OR (educational supplement))))".
• Adding a wildcard symbol may retrieve word variants: some ((((occasional supplement) or (occasional retirement))) or (((additional supplement) OR (educational supplement))))*.