Perhaps you should try some spelling variations:
"scope research series" » "scope research services", "scope research theories", "scope research studies", "europe research series", "cube research series", "cure research series"
"curve research series" » "curve research services", "curve research theories", "curve research studies", "cure research series", "survey research series", "cave research series"

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: (("scope research series") OR ("curve research series")).
• Removing quotes may allow a broader search: (( scope research series ) or ( curve research series )).
• Adding a wildcard symbol may retrieve word variants: (("scope research series") or ("curve research series"))*.