Perhaps you should try some spelling variations:
international closed » international case, international cross, international crises
international pdr » international port, international air, international ports
closed economies » closed economy, planned economies, open economies
economies were » economies more, economies have, economies face
economic case » economics case, economic cost, economic crises
pdr economic » poor economic, war economic, _ economic

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( international closed economies were ) or ( international pdr economic case ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( international closed economies were ) OR ( international pdr economic case )).
• Adding a wildcard symbol may retrieve word variants: (( international closed economies were ) or ( international pdr economic case ))*.