Perhaps you should try some spelling variations:
"resource research series" » "resources research series", "resource search series", "source research series", "resource research services", "resource research studies", "resource research service"
"rescue research theories" » "rescue research themes", "rescue research topics", "rescue research three", "residue research theories", "rescue search theories", "issue research theories"
"rescue research series" » "residue research series", "rescue search series", "issue research series", "rescue research services", "rescue research studies", "rescue research service"
"rescue research theory" » "residue research theory", "rescue search theory", "issue research theory", "rescue research through"
"tissue research theory" » "tissue research through", "issues research theory", "pressure research theory", "disease research theory"

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