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

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