Perhaps you should try some spelling variations:
"international property economic series" » "international prosperity economic series", "international poverty economic series", "international project economic series", "international property economics series", "international property economic services", "international property economic theories"
"international rich economy series" » "international rice economy series", "international price economy series", "international risk economy series", "international rich economics series", "international rich economies series", "international french economy series", "international cash economy series"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("international property economic series") or ("international rich economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international property economic series") OR ("international rich economy series")).
• Removing quotes may allow a broader search: (( international property economic series ) or ( international rich economy series )).
• Adding a wildcard symbol may retrieve word variants: (("international property economic series") or ("international rich economy series"))*.