Perhaps you should try some spelling variations:
"industrial development center series" » "industrial development case series", "industrial development century series", "industrial development gender series", "industrial development center studies"
"industrial procurement agents survey" » "industrial procurement agent survey", "industrial procurement audits survey", "industrial procurement plans survey", "industrial procurement parents survey", "industrial procurement parents surveys", "industrial procurement payments survey"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("industrial development center series") OR ("industrial procurement agents survey"))~.
• Removing quotes may allow a broader search: (( industrial development center series ) or ( industrial procurement agents survey ))~.
• Adding a wildcard symbol may retrieve word variants: (("industrial development center series") or ("industrial procurement agents survey"))*.