Perhaps you should try some spelling variations:
cleaner supplementary » cortex supplementary, aged supplementary, annex supplementary
eleven supplementary » selected supplementary, present supplementary, led supplementary
report supplementary » report supplement
level supplementary » several supplementary, severi supplementary, led supplementary

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: ((level supplementary) OR (((((eleven supplementary) OR (cleaner supplementary))) OR (report supplementary)))) series.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((level supplementary) or (((((eleven supplementary) OR (cleaner supplementary))) or (report supplementary)))) series".
• Adding a wildcard symbol may retrieve word variants: ((level supplementary) or (((((eleven supplementary) OR (cleaner supplementary))) or (report supplementary)))) series*.