Perhaps you should try some spelling variations:
"resource research series" » "resources research series", "resource search series", "source research series", "resource research services", "resource research theories", "resource research service"
"resident research studies" » "residents research studies", "president research studies", "residency research studies"
"resident research study" » "residents research study", "president research study", "residency research study"

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: (("resource research series") OR ((("resident research studies") OR ("resident research study")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"resource research series\") or (((\"resident research studies\") OR (\"resident research study\"))))".
• Removing quotes may allow a broader search: (( resource research series ) or ((( resident research studies ) OR ( resident research study )))).
• Adding a wildcard symbol may retrieve word variants: (("resource research series") or ((("resident research studies") OR ("resident research study"))))*.