Perhaps you should try some spelling variations:
"industrial development research period" » "industrial development report period", "industrial development research prior", "industrial development research persona", "industrial development research series"
"industrial development results operation" » "industrial development report operation", "industrial development results section"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("industrial development research period") or ("industrial development results operation"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("industrial development research period") OR ("industrial development results operation")).
• Removing quotes may allow a broader search: (( industrial development research period ) or ( industrial development results operation )).
• Adding a wildcard symbol may retrieve word variants: (("industrial development research period") or ("industrial development results operation"))*.