Perhaps you should try some spelling variations:
"residual research studies" » "residues research studies", "residue research studies", "resident research studies"
"residual research study" » "residues research study", "residue research study", "resident research study"
"rescue a series" » "rescue _ series"

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: (("rescue a series") OR ((("residual research studies") OR ("residual research study")))).
• Removing quotes may allow a broader search: (( rescue a series ) or ((( residual research studies ) or ( residual research study )))).
• Adding a wildcard symbol may retrieve word variants: (("rescue a series") or ((("residual research studies") or ("residual research study"))))*.