Perhaps you should try some spelling variations:
"rescue research series" » "residue research series", "resource research series", "tissue research series", "rescue research services", "rescue research theories", "rescue research studies", "rescue research queries", "rescue research server"
"rescue search series" » "rescue sar series", "rescue search services", "rescue search queries", "rescue search server"

You may be able to get more results by adjusting your search query.

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