Perhaps you should try some spelling variations:
"e learning sources series." » "e learning source series.", "e learning resources series.", "e learning resource series."
"3 learning care series." » "3 learning case series.", "3 learning core series.", "3 learning can series.", "3 learning care services.", "3 learning faire series.", "3 learning page series.", "2 learning care series."
"3 learning curve series." » "3 learning survey series.", "3 learning course series.", "3 learning surveys series.", "2 learning curve series."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("e learning sources series.") or ((("3 learning curve series.") OR ("3 learning care series."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("e learning sources series.") OR ((("3 learning curve series.") OR ("3 learning care series.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"e learning sources series.\") or (((\"3 learning curve series.\") OR (\"3 learning care series.\"))))".
• Removing quotes may allow a broader search: (( e learning sources series. ) or ((( 3 learning curve series. ) OR ( 3 learning care series. )))).
• Adding a wildcard symbol may retrieve word variants: (("e learning sources series.") or ((("3 learning curve series.") OR ("3 learning care series."))))*.