Perhaps you should try some spelling variations:
"rescue research theories" » "rescue research theory", "rescue research themes", "rescue research three", "residue research theories", "resource research theories", "tissue research theories"
"rescue research series" » "residue research series", "resource research series", "tissue research series", "rescue research services", "rescue research studies", "rescue research service", "rescue research queries", "rescue research server"
"rescue research topics" » "residue research topics", "resource research topics", "tissue research topics"
"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 series") OR ("rescue search series"))) OR ((("rescue research theories") OR ("rescue research topics")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"rescue research series\") or (\"rescue search series\"))) or (((\"rescue research theories\") OR (\"rescue research topics\"))))".
• Removing quotes may allow a broader search: (((( rescue research series ) or ( rescue search series ))) or ((( rescue research theories ) OR ( rescue research topics )))).
• Adding a wildcard symbol may retrieve word variants: (((("rescue research series") or ("rescue search series"))) or ((("rescue research theories") OR ("rescue research topics"))))*.