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

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 ("residual research series")))).
• 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 (\"residual research series\"))))".
• Removing quotes may allow a broader search: (((( rescue research studies ) or ((( tissue research series ) or ( pressure research series ))))) or ((( residue research series ) OR ( residual research series )))).
• Adding a wildcard symbol may retrieve word variants: (((("rescue research studies") or ((("tissue research series") or ("pressure research series"))))) or ((("residue research series") OR ("residual research series"))))*.