Perhaps you should try some spelling variations:
"function system _ tools" » "function systems _ tools"
"function spaces using tools" » "function systems using tools", "function space using tools", "function gases using tools", "function paper using tools"
"fusion system a tools" » "diffusion systems a tools", "function systems a tools", "fusion systems _ tools", "fusion system a tool"

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: (("function spaces using tools") or ((("fusion system a tools") or ("function system _ tools"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("function spaces using tools") OR ((("fusion system a tools") OR ("function system _ tools")))).
• Removing quotes may allow a broader search: (( function spaces using tools ) or ((( fusion system a tools ) or ( function system _ tools )))).
• Adding a wildcard symbol may retrieve word variants: (("function spaces using tools") or ((("fusion system a tools") or ("function system _ tools"))))*.