Talvez debería tentar con algunhas variantes ortográficas:
international comparative » international cooperation, international comparison, international computer
comparative problems » operative problems, cooperative problem, comparative process
problems relations » problems relating, problems operations, problems selections
concepts citrus » concepts cited, concepts critiques, concepts circuits
concepts chris » concepts cases, concepts care, concepts carol

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

• Performing a fuzzy search may retrieve terms with similar spellings: international comparative problems relations ((concepts citrus) or (concepts chris))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: international comparative problems relations ((concepts citrus) OR (concepts chris)).
• Adding a wildcard symbol may retrieve word variants: international comparative problems relations ((concepts citrus) or (concepts chris))*.