Perhaps you should try some spelling variations:
"journal of european debt since research" » "journal of european debt science research", "journal of european debt rice research", "journal of european debt space research", "journal of european data since research", "journal of european debt inc research", "journal of european debt finance research"
"journal of european road peace research" » "journal of european road science research", "journal of european road space research"

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: (("journal of european debt since research") OR ("journal of european road peace research"))~.
• Removing quotes may allow a broader search: (( journal of european debt since research ) or ( journal of european road peace research ))~.
• Adding a wildcard symbol may retrieve word variants: (("journal of european debt since research") or ("journal of european road peace research"))*.