Perhaps you should try some spelling variations:
"tissue research studies" » "tissue research study", "pressure research studies", "disease research studies"
"residue research series" » "residues research series", "residual research series", "resident research series", "residue research services", "residue research theories", "residue research service"
"rescue research series" » "rescue search series", "resource research series", "issue research series", "rescue research services", "rescue research theories", "rescue research service"
"tissue research series" » "tissue research services", "tissue research theories", "tissue research service", "pressure research series", "disease research series"
"issues research series" » "issues research services", "issues research theories", "issues 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 series") OR ((((("tissue research series") OR ("issues research series"))) OR ("tissue research studies"))))) OR ("residue research series")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"rescue research series\") or (((((\"tissue research series\") OR (\"issues research series\"))) or (\"tissue research studies\"))))) or (\"residue research series\"))".
• Removing quotes may allow a broader search: (((( rescue research series ) or ((((( tissue research series ) OR ( issues research series ))) or ( tissue research studies ))))) or ( residue research series )).
• Adding a wildcard symbol may retrieve word variants: (((("rescue research series") or ((((("tissue research series") OR ("issues research series"))) or ("tissue research studies"))))) or ("residue research series"))*.