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

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