Perhaps you should try some spelling variations:
"international power economic series" » "international poverty economic series", "international ports economic series", "international panel economic series", "international power economics series", "international power economic services", "international power economic theories", "international poor economic series", "international over economic series", "international closer economic series"
"international open economy series" » "international hope economy series", "international order economy series", "international scope economy series", "international open economics series"

Try widening your search to All Fields.

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