Perhaps you should try some spelling variations:
"ciencias experimental de tecnologia ;" » "ciencia experimental de tecnologia ;", "ciencies experimentals de tecnologia ;", "ciencias experimentos de tecnologia ;", "ciencias experimental y tecnologia ;", "ciencias experimental la tecnologia ;", "ciencias experimental 664 tecnologia ;"
"ciencias experimentales de tecnologia ;" » "ciencia experimentales de tecnologia ;", "ciencies experimentalses de tecnologia ;", "ciencias experimentoses de tecnologia ;", "ciencias experimentales y tecnologia ;", "ciencias experimental del tecnologia ;", "ciencias experimentos de tecnologia ;", "ciencias experimentales la tecnologia ;", "ciencias experimentales 664 tecnologia ;"

Try widening your search to All Fields.

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