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