Perhaps you should try some spelling variations:
"e planning review studies." » "e planning soviet studies.", "e planning device studies.", "e planning reviewed studies.", "e planning review series.", "e planning review study.", "2 planning review studies.", "3 planning review studies.", "4 planning review studies."
"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: (((("3 learning care series.") OR ("3 learning curve series."))) or ("e planning review studies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("3 learning care series.") OR ("3 learning curve series."))) OR ("e planning review studies.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"3 learning care series.\") OR (\"3 learning curve series.\"))) or (\"e planning review studies.\"))".
• Removing quotes may allow a broader search: (((( 3 learning care series. ) OR ( 3 learning curve series. ))) or ( e planning review studies. )).
• Adding a wildcard symbol may retrieve word variants: (((("3 learning care series.") OR ("3 learning curve series."))) or ("e planning review studies."))*.