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

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