Perhaps you should try some spelling variations:
"rescue research theories" » "rescue research theory", "rescue research themes", "rescue research topics", "residue research theories", "resource research theories", "issue research theories", "rescue reearth theories", "rescue research queries"
"resident research series" » "residents research series", "president research series", "residency research series", "resident research services", "resident research studies", "resident research service"
"tissue research series" » "issues research series", "pressure research series", "disease research series", "tissue research services", "tissue research studies", "tissue research service"
"rescue search theories" » "rescue earth theories", "rescue search theory", "rescue search queries", "rescue sar theories"

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