Perhaps you should try some spelling variations:
"open economies conditions 21st century." » "open economic conditions 21st century.", "open economic condition 21st century.", "open economic conditiond 21st century.", "open economy conditions 21st century."
"open economic transition 20th century." » "open economic transformation 20th century.", "open economic transition 20 century.", "open economic transition 2 century.", "open economic transition 2.3 century.", "open economics transition 20th century.", "women economic transition 20th century.", "open economy transition 20th century."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("open economies conditions 21st century.") or ("open economic transition 20th century."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("open economies conditions 21st century.") OR ("open economic transition 20th century.")).
• Removing quotes may allow a broader search: (( open economies conditions 21st century. ) or ( open economic transition 20th century. )).
• Adding a wildcard symbol may retrieve word variants: (("open economies conditions 21st century.") or ("open economic transition 20th century."))*.