Perhaps you should try some spelling variations:
function systems » equation systems, function spaces, fusion system
function place » function spaces
place based » phase based, slacks based
based tool » based two
systems a » systems _, system a, systems via
a tools » a tool, _ tools

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( function place based tool ) or ( function systems a tools ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( function place based tool ) OR ( function systems a tools )).
• Adding a wildcard symbol may retrieve word variants: (( function place based tool ) or ( function systems a tools ))*.