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

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