Perhaps you should try some spelling variations:
"first graph specification document" » "first graph classification document", "first graph specification driven", "first graph specific document", "first graphs specification document", "first graph sparsification document", "first graph verification document", "first grade specification document", "first grand specification document"
"first graph modification document" » "first graph clarification document", "first graph justification document", "first graph modification solvent", "first graph classification document", "first grade modification document", "first grand 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 modification document") OR ("first graph specification document")).
• Removing quotes may allow a broader search: (( first graph modification document ) or ( first graph specification document )).
• Adding a wildcard symbol may retrieve word variants: (("first graph modification document") or ("first graph specification document"))*.