Perhaps you should try some spelling variations:
"smart social surveys." » "smart topical surveys.", "small social surveys.", "art social surveys.", "sport social surveys."
"summary social surveys." » "summary topical surveys.", "summary socio surveys.", "primary social surveys."
"motor skills series." » "motor skills surveys.", "motor skills service.", "motor skills studies.", "labor 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: (("motor skills series.") OR ((("smart social surveys.") OR ("summary social surveys."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"motor skills series.\") OR (((\"smart social surveys.\") OR (\"summary social surveys.\"))))".
• Removing quotes may allow a broader search: (( motor skills series. ) OR ((( smart social surveys. ) OR ( summary social surveys. )))).
• Adding a wildcard symbol may retrieve word variants: (("motor skills series.") OR ((("smart social surveys.") OR ("summary social surveys."))))*.