Perhaps you should try some spelling variations:
"ciencias experimentales 664 tecnologia ;" » "ciencias experimentales y tecnologia ;", "ciencias experimentales de tecnologia ;", "ciencias experimentales en tecnologia ;", "ciencias experimentales la tecnologia ;"
"science experiments de tecnologia ;" » "science experimentos de tecnologia ;", "science experimento de tecnologia ;", "science experimentos del tecnologia ;", "science experiments y tecnologia ;", "science experiments la tecnologia ;"

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: (("science experiments de tecnologia ;") or ("ciencias experimentales 664 tecnologia ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("science experiments de tecnologia ;") OR ("ciencias experimentales 664 tecnologia ;")).
• Removing quotes may allow a broader search: (( science experiments de tecnologia ; ) or ( ciencias experimentales 664 tecnologia ; )).
• Adding a wildcard symbol may retrieve word variants: (("science experiments de tecnologia ;") or ("ciencias experimentales 664 tecnologia ;"))*.