Perhaps you should try some spelling variations:
"smart social surveys." » "smart topical surveys.", "small social surveys.", "art social surveys.", "sport social surveys."
"motor skills series." » "motor skills surveys.", "motor skills service.", "motor skills studies.", "labor skills series."
"summary socio surveys." » "summary social surveys.", "summary section surveys.", "summary social survey.", "summary micro surveys."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("motor skills series.") OR ((("smart social surveys.") OR ("summary socio surveys."))))~.
• Removing quotes may allow a broader search: (( motor skills series. ) or ((( smart social surveys. ) or ( summary socio surveys. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("motor skills series.") or ((("smart social surveys.") or ("summary socio surveys."))))*.