Perhaps you should try some spelling variations:
"sciences research series" » "science research series", "services research series", "sciences research services", "sciences research theories", "sciences research studies"
"sources research series" » "resources research series", "services research series", "devices research series", "sources research services", "sources research theories", "sources research studies"
"source research series" » "force research series", "source search series", "resources research series", "source research services", "source research theories", "source research studies"

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: (("source research series") OR ((("sources research series") OR ("sciences research series"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"source research series\") or (((\"sources research series\") OR (\"sciences research series\"))))*".
• Removing quotes may allow a broader search: (( source research series ) or ((( sources research series ) OR ( sciences research series ))))*.