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