Perhaps you should try some spelling variations:
"aei studies on series treaty negotiations." » "aei studies on series trade negotiations.", "aei studies on series trade negotiation.", "aei studies on series peace negotiations.", "aei studies on series trends negotiations.", "asian studies on series treaty negotiations.", "case studies on series treaty negotiations."
"aei studies on series loan negotiation." » "aei studies on series trade negotiation.", "aei studies on series _ negotiation.", "aei studies on series wage negotiation.", "asian studies on series loan negotiation.", "case studies on series loan negotiation."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("aei studies on series treaty negotiations.") or ("aei studies on series loan negotiation."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("aei studies on series treaty negotiations.") OR ("aei studies on series loan negotiation.")).
• Removing quotes may allow a broader search: (( aei studies on series treaty negotiations. ) or ( aei studies on series loan negotiation. )).
• Adding a wildcard symbol may retrieve word variants: (("aei studies on series treaty negotiations.") or ("aei studies on series loan negotiation."))*.