Perhaps you should try some spelling variations:
"pensamiento crtico/pensamiento utopico ;" » "pensamiento crtico/pensamiento politico ;", "pensamiento etico/pensamiento utopico ;", "pensamiento mitico/pensamiento utopico ;", "pensamientos criticos/pensamiento utopico ;"
"pensamiento crtico/pensamiento critico ;" » "pensamiento etico/pensamiento critico ;", "pensamiento mitico/pensamiento critico ;", "pensamientos criticos/pensamiento critico ;", "pensamiento crtico/pensamiento critica ;"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("pensamiento crtico/pensamiento utopico ;") OR ("pensamiento crtico/pensamiento critico ;"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"pensamiento crtico/pensamiento utopico ;\") OR (\"pensamiento crtico/pensamiento critico ;\"))".
• Removing quotes may allow a broader search: (( pensamiento crtico/pensamiento utopico ; ) OR ( pensamiento crtico/pensamiento critico ; )).
• Adding a wildcard symbol may retrieve word variants: (("pensamiento crtico/pensamiento utopico ;") OR ("pensamiento crtico/pensamiento critico ;"))*.