Perhaps you should try some spelling variations:
"level supplementary steroids" » "level supplementary services", "level supplementary studies", "level supplementary memoirs", "eleven supplementary steroids", "several supplementary steroids", "five supplementary steroids"
"severi supplementary queries" » "severi supplementary exercises", "severi supplementary services", "severi supplementary studies", "several supplementary queries", "eleven supplementary queries", "five supplementary queries"
"severi supplementary series" » "several supplementary series", "eleven supplementary series", "five supplementary series", "severi supplementary services", "severi supplementary studies", "severi supplementary sources"

Try widening your search to All Fields.

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 steroids") OR ((("severi supplementary series") OR ("severi supplementary queries")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"level supplementary steroids\") or (((\"severi supplementary series\") OR (\"severi supplementary queries\"))))".
• Removing quotes may allow a broader search: (( level supplementary steroids ) or ((( severi supplementary series ) OR ( severi supplementary queries )))).
• Adding a wildcard symbol may retrieve word variants: (("level supplementary steroids") or ((("severi supplementary series") OR ("severi supplementary queries"))))*.