Perhaps you should try some spelling variations:
"research written paper" » "research write paper", "research within paper", "research writing paper", "research written after"
"research working paper" » "research workshop paper"
"research waste paper" » "research fast paper", "research past paper", "research water paper", "research white paper"
"research what paper" » "research what proper", "research what power", "research what page"

Try widening your search to All Fields.

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: (((((("research written paper") OR ("research working paper"))) OR ("research waste paper"))) OR ("research what paper")).
• Removing quotes may allow a broader search: (((((( research written paper ) or ( research working paper ))) or ( research waste paper ))) or ( research what paper )).
• Adding a wildcard symbol may retrieve word variants: (((((("research written paper") or ("research working paper"))) or ("research waste paper"))) or ("research what paper"))*.