Perhaps you should try some spelling variations:
"industrial development efforts series" » "industrial development report series", "industrial development reports series", "industrial development efforts sometimes", "industrial development exporters series"
"industrial development forest periods" » "industrial development forests periods", "industrial development first periods", "industrial development foreign periods", "industrial development rest periods", "industrial development first period", "industrial development rest period"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"industrial development efforts series\") OR (\"industrial development forest periods\"))~".
• Removing quotes may allow a broader search: (( industrial development efforts series ) OR ( industrial development forest periods ))~.
• Adding a wildcard symbol may retrieve word variants: (("industrial development efforts series") OR ("industrial development forest periods"))*.