Perhaps you should try some spelling variations:
"pressure research series" » "present research series", "pressure release series", "pressure research theories", "pressure research service", "pressure research summaries"
"residue research services" » "residue research service", "residue search services", "residue search service", "residues research services", "residual research services", "resident research services"
"rescue research studies" » "rescue research study", "rescue search studies", "resource research studies", "issue research studies"
"residue research series" » "residues research series", "residual research series", "resident research series", "residue research theories", "residue research service", "residue research summaries"
"tissue research series" » "issues research series", "disease research series", "tissue research theories", "tissue research service", "tissue research summaries"

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