Perhaps you should try some spelling variations:
"technological cooperation periodicals." » "technological operation periodicals.", "technological corporations periodicals.", "technological competition periodicals.", "technological conservation periodicals.", "technological construction periodicals.", "technological protection periodicals."
"technology convention periodicals." » "technology conventions periodicals.", "technology conversion periodicals.", "technology prevention periodicals.", "technology connection periodicals.", "technology competition periodicals."

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

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