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