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