Perhaps you should try some spelling variations:
"tissue research studies" » "tissue research study", "issues research studies", "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", "issues research series", "pressure research series", "disease research series"

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 ("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 (\"tissue research studies\"))))) or (\"residue research series\"))*".
• Removing quotes may allow a broader search: (((( rescue research series ) or ((( tissue research series ) OR ( tissue research studies ))))) or ( residue research series ))*.