Perhaps you should try some spelling variations:
international operations » international cooperation, international relations, international federation
problems creating » problems computing, problems treatment, problems affecting
problems testing » problems detecting, problems affecting, problems finding
concepts cited » concepts cases, concepts case, concepts care

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

• Performing a fuzzy search may retrieve terms with similar spellings: international operations ((problems creating) OR (problems testing)) concepts cited~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "international operations ((problems creating) OR (problems testing)) concepts cited".
• Adding a wildcard symbol may retrieve word variants: international operations ((problems creating) OR (problems testing)) concepts cited*.