Perhaps you should try some spelling variations:
"math patient surveys." » "math national surveys."
"haiti school surveys." » "high school surveys."
"math site surveys." » "math firm surveys."
"small school survey." » "small schools survey."
"math school surveys." » "map school surveys.", "smart school surveys.", "state school surveys."
"iii school surveys." » "ivr school surveys.", "iivr school surveys.", "i_ school surveys.", "ia school surveys."
"ii school surveys." » "ivr school surveys.", "_ school surveys.", "a school surveys."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("math patient surveys.") or ((((((("math school surveys.") or ((("haiti school surveys.") or ((("ii school surveys.") OR ("iii school surveys."))))))) or ("math site surveys."))) or ("small school survey."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("math patient surveys.") OR ((((((("math school surveys.") OR ((("haiti school surveys.") OR ((("ii school surveys.") OR ("iii school surveys."))))))) OR ("math site surveys."))) OR ("small school survey.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"math patient surveys.\") or (((((((\"math school surveys.\") or (((\"haiti school surveys.\") or (((\"ii school surveys.\") OR (\"iii school surveys.\"))))))) or (\"math site surveys.\"))) or (\"small school survey.\"))))".
• Removing quotes may allow a broader search: (( math patient surveys. ) or ((((((( math school surveys. ) or ((( haiti school surveys. ) or ((( ii school surveys. ) OR ( iii school surveys. ))))))) or ( math site surveys. ))) or ( small school survey. )))).
• Adding a wildcard symbol may retrieve word variants: (("math patient surveys.") or ((((((("math school surveys.") or ((("haiti school surveys.") or ((("ii school surveys.") OR ("iii school surveys."))))))) or ("math site surveys."))) or ("small school survey."))))*.