Perhaps you should try some spelling variations:
"industrial development congresses period" » "industrial development processes period", "industrial development congresses africa", "industrial development congresses penang", "industrial development kongresses prof"
"industrial development report period" » "industrial development reporting period", "industrial development report series", "industrial development rest period"

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 congresses period") OR ("industrial development report period"))~.
• Removing quotes may allow a broader search: (( industrial development congresses period ) or ( industrial development report period ))~.
• Adding a wildcard symbol may retrieve word variants: (("industrial development congresses period") or ("industrial development report period"))*.