Perhaps you should try some spelling variations:
"resource research studies" » "resources research studies", "resource search studies", "source research studies", "resource research study"
"rescue research studies" » "rescue research study", "tissue research studies", "issue research studies", "response research studies"
"residue research series" » "residues research series", "residual research series", "resident research series", "residue research services", "residue research theories", "residue research service", "residue research queries", "residue research server"
"rescue search series" » "rescue sar series", "rescue search services", "rescue search queries", "rescue search server"

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 research studies") OR ("resource research studies"))) OR ("rescue search series"))) OR ("residue research series")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"rescue research studies\") OR (\"resource research studies\"))) or (\"rescue search series\"))) or (\"residue research series\"))".
• Removing quotes may allow a broader search: (((((( rescue research studies ) OR ( resource research studies ))) or ( rescue search series ))) or ( residue research series )).
• Adding a wildcard symbol may retrieve word variants: (((((("rescue research studies") OR ("resource research studies"))) or ("rescue search series"))) or ("residue research series"))*.