Perhaps you should try some spelling variations:
"china econometric relations periodicals." » "china econometric evaluations periodicals.", "china trigonometric relations periodicals.", "china economic relation periodicals.", "china economic relations periodicals.", "capital econometric relations periodicals.", "crises econometric relations periodicals."
"poland economic relations periodicals." » "islands economic relations periodicals.", "england economic relations periodicals.", "policy economic relations periodicals."

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: (("poland economic relations periodicals.") or ("china econometric relations periodicals."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("poland economic relations periodicals.") OR ("china econometric relations periodicals.")).
• Removing quotes may allow a broader search: (( poland economic relations periodicals. ) or ( china econometric relations periodicals. )).
• Adding a wildcard symbol may retrieve word variants: (("poland economic relations periodicals.") or ("china econometric relations periodicals."))*.