Perhaps you should try some spelling variations:
"rescue research theories" » "rescue research themes", "rescue research topics", "rescue research three", "rescue search theories", "resource research theories", "tissue research theories"
"residue research series" » "residues research series", "residual research series", "resident research series", "residue research services", "residue research studies", "residue research summaries"
"residue research service" » "residues research service", "residual research service", "resident research service", "residue search service", "residue research overview", "residue research section"
"rescue research theory" » "rescue search theory", "resource research theory", "tissue research theory", "rescue research through"

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