Perhaps you should try some spelling variations:
"rescue research theories" » "rescue research theory", "rescue research themes", "rescue research topics", "rescue search theories", "resource research theories", "tissue research theories"
"residues research series" » "residents research series", "resins research series", "resources research series", "residues research services", "residues research service", "residues research summaries"
"rescue research studies" » "rescue research study", "rescue search studies", "resource research studies", "tissue research studies"
"residue research series" » "residual research series", "resident research series", "resins research series", "residue research services", "residue research service", "residue research summaries"
"rescue research series" » "rescue search series", "resource research series", "tissue research series", "rescue research services", "rescue research service", "rescue research summaries"

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