Perhaps you should try some spelling variations:
"smart school surveys." » "smart school survey.", "start school surveys.", "small schools surveys.", "art schools surveys."
"small school surveys." » "small school survey.", "small schools surveys."
"smart skills series." » "smart skills surveys."
"math skills series." » "math skills surveys.", "motor skills series."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("smart skills series.") or ("math skills series."))) or ((("smart school surveys.") OR ("small school surveys."))))) or ("soft skills survey."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("smart skills series.") OR ("math skills series."))) OR ((("smart school surveys.") OR ("small school surveys."))))) OR ("soft skills survey.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"smart skills series.\") or (\"math skills series.\"))) or (((\"smart school surveys.\") OR (\"small school surveys.\"))))) or (\"soft skills survey.\"))".
• Removing quotes may allow a broader search: (((((( smart skills series. ) or ( math skills series. ))) or ((( smart school surveys. ) OR ( small school surveys. ))))) or ( soft skills survey. )).
• Adding a wildcard symbol may retrieve word variants: (((((("smart skills series.") or ("math skills series."))) or ((("smart school surveys.") OR ("small school surveys."))))) or ("soft skills survey."))*.