Perhaps you should try some spelling variations:
"first graph sparsification document" » "first graph classification document", "first graph specification document", "first graph clarification document", "first graphs specification document", "first _ sparsification document", "first grade sparsification document", "first grand sparsification document"
"first graph modification document" » "first graph specification document", "first graph clarification document", "first graph justification document", "first graph classification document", "first grade modification document", "first grand modification document"
"first made modification document" » "first made specification document", "first made clarification document", "first made justification document", "first made modifications document", "first image modification document", "first shade modification document", "first model modification document"

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: (("first graph sparsification document") OR ((("first graph modification document") OR ("first made modification document")))).
• Removing quotes may allow a broader search: (( first graph sparsification document ) or ((( first graph modification document ) or ( first made modification document )))).
• Adding a wildcard symbol may retrieve word variants: (("first graph sparsification document") or ((("first graph modification document") or ("first made modification document"))))*.