Perhaps you should try some spelling variations:
"smart point surveys." » "smart patient surveys.", "smart phone surveys.", "smart point sources.", "smart port surveys.", "smart policy surveys."
"smart skills series." » "math skills series."
"smart skills surveys." » "math skills surveys."
"smart soil surveys." » "smart social surveys.", "smart school surveys.", "smart site surveys."

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