Perhaps you should try some spelling variations:
"math school surveys." » "math school survey.", "map school surveys.", "small school surveys.", "smart school surveys."
"math skills series." » "math skills surveys.", "math skills survey."
"motor skills series." » "motor skills surveys.", "motor skills survey.", "labor skills series."
"math point surveys." » "math patient surveys.", "math point sources.", "math soil surveys."
"math phone surveys." » "math phone survey."

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: (((("math skills series.") OR ("motor skills series."))) OR ((((("math point surveys.") OR ("math phone surveys."))) OR ("math school surveys."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"math skills series.\") OR (\"motor skills series.\"))) or (((((\"math point surveys.\") or (\"math phone surveys.\"))) or (\"math school surveys.\"))))~".
• Removing quotes may allow a broader search: (((( math skills series. ) OR ( motor skills series. ))) or ((((( math point surveys. ) or ( math phone surveys. ))) or ( math school surveys. ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("math skills series.") OR ("motor skills series."))) or ((((("math point surveys.") or ("math phone surveys."))) or ("math school surveys."))))*.