Perhaps you should try some spelling variations:
"ejecutivo mexico aspectos metodologicos." » "ejecutivo mexico aspectos psicologicos.", "executives mexico aspectos metodologicos.", "educativo mexico aspectos metodologicos."
"ejercicio fisico aspectos sociologicos." » "ejercicio fisico aspectos psicologicos.", "ejercicio fisico aspectos economicos.", "ejercicio fisica aspectos sociologicos.", "ejercicio diseno aspectos sociologicos."

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: (("ejecutivo mexico aspectos metodologicos.") or ("ejercicio fisico aspectos sociologicos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("ejecutivo mexico aspectos metodologicos.") OR ("ejercicio fisico aspectos sociologicos.")).
• Removing quotes may allow a broader search: (( ejecutivo mexico aspectos metodologicos. ) or ( ejercicio fisico aspectos sociologicos. )).
• Adding a wildcard symbol may retrieve word variants: (("ejecutivo mexico aspectos metodologicos.") or ("ejercicio fisico aspectos sociologicos."))*.