Perhaps you should try some spelling variations:
"research later papers" » "research water papers", "research laser papers", "research lter papers", "research kater papers", "research larger papers", "research laserr papers", "research late papers", "research latin papers"
"research state papers" » "research status papers", "research strategy papers", "research station papers", "research staff papers"
"research gate papers" » "research gated papers", "research game papers", "research kate papers", "research late papers", "research waste papers", "research care papers"
"research late paper" » "research kate paper", "research large paper", "research laser paper", "research waste paper"

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 state papers") OR ((((("research gate papers") OR ("research late paper"))) OR ("research later papers")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"research state papers\") or (((((\"research gate papers\") OR (\"research late paper\"))) or (\"research later papers\"))))".
• Removing quotes may allow a broader search: (( research state papers ) or ((((( research gate papers ) OR ( research late paper ))) or ( research later papers )))).
• Adding a wildcard symbol may retrieve word variants: (("research state papers") or ((((("research gate papers") OR ("research late paper"))) or ("research later papers"))))*.