Perhaps you should try some spelling variations:
"resident research studies" » "residents research studies", "president research studies", "residency research studies"
"residual research study" » "residues research study", "residue research study", "residential research study"
"rescue sar series" » "rescue a series", "rescue spr series", "rescue sr series", "rescue sarvi 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 sar series") OR ((("resident research studies") OR ("residual research study")))).
• Removing quotes may allow a broader search: (( rescue sar series ) or ((( resident research studies ) or ( residual research study )))).
• Adding a wildcard symbol may retrieve word variants: (("rescue sar series") or ((("resident research studies") or ("residual research study"))))*.