Perhaps you should try some spelling variations:
"journal of european debt peace research" » "journal of european data peace research", "journal of european debt price research"
"journal of europe road science research" » "journal of europe food science research", "journal of europe good science research", "journal of europe road scene research", "journal of european road science research", "journal of euro road science 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 peace research") OR ("journal of europe road science research"))~.
• Removing quotes may allow a broader search: (( journal of european debt peace research ) or ( journal of europe road science research ))~.
• Adding a wildcard symbol may retrieve word variants: (("journal of european debt peace research") or ("journal of europe road science research"))*.