Perhaps you should try some spelling variations:
"industrial investment barriers series" » "industrial investments barriers series", "industry investment barriers series", "initial investment barriers series", "industrial investment barriers drivers"
"industrial development center series" » "industrial development case series", "industrial development century series", "industrial development gender series", "industrial development center studies"

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

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