Perhaps you should try some spelling variations:
eleven supplementary » selected supplementary, cleaner supplementary, present supplementary
report supplementary » report supplement
level supplementary » several supplementary, severi supplementary, five 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 (report supplementary)))) series.
• Adding a wildcard symbol may retrieve word variants: ((level supplementary) or (((eleven supplementary) or (report supplementary)))) series*.