Perhaps you should try some spelling variations:
powerful regional » power regional, powerful personal, portal regional
entry industrial » century industrial, entry industries, entre industriels
industrial base » industrial areas
poor regional » power regional, poor regions, nor regional
poor region » poor regions, poorer regions

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

• Performing a fuzzy search may retrieve terms with similar spellings: entry industrial base ((((poor regional) OR (poor region))) or (powerful regional)) disparities.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: entry industrial base ((((poor regional) OR (poor region))) OR (powerful regional)) disparities..
• The words AND, OR and NOT may confuse the search; try adding quotes: "entry industrial base ((((poor regional) OR (poor region))) or (powerful regional)) disparities.".
• Adding a wildcard symbol may retrieve word variants: entry industrial base ((((poor regional) OR (poor region))) or (powerful regional)) disparities.*.