Perhaps you should try some spelling variations:
"pension symptoms using tools" » "pension systems using tools", "pension symptoms among tools"
"function spaces a tool" » "function systems a tool", "function spaces fp tool", "function spaces hs tool", "function spacex va tool"
"function spaces _ tool" » "function systems _ tool"

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: (("pension symptoms using tools") OR ((("function spaces a tool") OR ("function spaces _ tool"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"pension symptoms using tools\") or (((\"function spaces a tool\") OR (\"function spaces _ tool\"))))~".
• Removing quotes may allow a broader search: (( pension symptoms using tools ) or ((( function spaces a tool ) OR ( function spaces _ tool ))))~.
• Adding a wildcard symbol may retrieve word variants: (("pension symptoms using tools") or ((("function spaces a tool") OR ("function spaces _ tool"))))*.