Perhaps you should try some spelling variations:
"new demand economic conditions periodicals." » "new demand economic innovations periodicals.", "new demand economic relations periodicals.", "new demands economic conditions periodicals.", "new dead economic conditions periodicals."
"new oecd economic nutrition periodicals." » "new oecd economic education periodicals.", "new oecd economics nutrition periodicals.", "new oecd economic penetration periodicals.", "new oecd economic situation periodicals.", "new world economic nutrition periodicals.", "new old economic nutrition periodicals.", "non oecd economic nutrition periodicals.", "ten oecd economic nutrition periodicals."

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

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