Perhaps you should try some spelling variations:
"map school surveys." » "map school survey.", "a school surveys.", "day school surveys.", "can school surveys."
"math skills series." » "math skills surveys.", "motor skills series."
"math point surveys." » "math patient surveys.", "math phone surveys.", "math point sources."
"math skills survey." » "motor skills survey."

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