Perhaps you should try some spelling variations:
"math patient surveys." » "math national surveys."
"motor skills surveys." » "motor skills survey.", "labor skills surveys."
"math school surveys." » "math school survey.", "map school surveys.", "smart school surveys.", "haiti school surveys."
"small school surveys." » "small school survey.", "small schools surveys."
"math point surveys." » "math phone surveys.", "math point sources.", "math using surveys."
"motor soil surveys." » "motor social surveys.", "motor site surveys.", "motor hiv surveys.", "motor skill surveys.", "poor soil 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 surveys.") OR ("motor soil surveys."))) OR ((((("math point surveys.") OR ("math patient surveys."))) OR ((("math school surveys.") OR ("small school surveys."))))))~.
• Removing quotes may allow a broader search: (((( motor skills surveys. ) or ( motor soil surveys. ))) or ((((( math point surveys. ) or ( math patient surveys. ))) or ((( math school surveys. ) or ( small school surveys. ))))))~.
• Adding a wildcard symbol may retrieve word variants: (((("motor skills surveys.") or ("motor soil surveys."))) or ((((("math point surveys.") or ("math patient surveys."))) or ((("math school surveys.") or ("small school surveys."))))))*.