Perhaps you should try some spelling variations:
"industrial development research per" » "industrial development report per", "industrial development research paper", "industrial development research peter", "industrial development research part"
"industrial development rest period" » "industrial development west period", "industrial development best period", "industrial development forest period", "industrial development rest periods", "industrial development test period", "industrial development last period"

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 rest period") or ("industrial development research per"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("industrial development rest period") OR ("industrial development research per"))*.
• Removing quotes may allow a broader search: (( industrial development rest period ) or ( industrial development research per ))*.