Perhaps you should try some spelling variations:
"pressure research series" » "present research series", "pressure release series", "pressure research services", "pressure research studies", "pressure research summaries"
"rescue research theories" » "rescue research theory", "rescue research themes", "rescue research topics", "rescue search theories", "issue research theories", "response research theories"
"resource research theories" » "resource research theory", "resource research themes", "resource research topics", "resources research theories", "resource search theories", "source research theories"
"residue research service" » "residues research service", "residual research service", "resident research service", "residue search service", "residue research overview", "residue research section"
"tissue research series" » "issues research series", "tissue research services", "tissue research studies", "tissue research summaries"
"disease research series" » "disease research services", "disease research studies", "disease research summaries"

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 ("disease research series"))) OR ("pressure research series"))) OR ((("rescue research theories") OR ("resource research theories"))))) OR ("residue research service")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((\"tissue research series\") OR (\"disease research series\"))) or (\"pressure research series\"))) or (((\"rescue research theories\") or (\"resource research theories\"))))) or (\"residue research service\"))".
• Removing quotes may allow a broader search: (((((((( tissue research series ) OR ( disease research series ))) or ( pressure research series ))) or ((( rescue research theories ) or ( resource research theories ))))) or ( residue research service )).
• Adding a wildcard symbol may retrieve word variants: (((((((("tissue research series") OR ("disease research series"))) or ("pressure research series"))) or ((("rescue research theories") or ("resource research theories"))))) or ("residue research service"))*.