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

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