Perhaps you should try some spelling variations:
"hechas las investigacion" » "hechas la investigacion", "hechas las investigaciones", "hechas a investigacion", "brechas las investigacion", "fechas la investigacion", "hechos la investigacion"
"beiras mas investigacion" » "beiras la investigacion", "beiras a investigacion", "beiras al investigacion", "beiras notas investigacion"
"brechas de investigacion" » "brechas la investigacion", "brechas del investigacion", "brecha de investigacion", "brechas y investigacion"

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: (("beiras mas investigacion") or ((("brechas de investigacion") or ("hechas las investigacion"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("beiras mas investigacion") OR ((("brechas de investigacion") OR ("hechas las investigacion")))).
• Removing quotes may allow a broader search: (( beiras mas investigacion ) or ((( brechas de investigacion ) or ( hechas las investigacion )))).
• Adding a wildcard symbol may retrieve word variants: (("beiras mas investigacion") or ((("brechas de investigacion") or ("hechas las investigacion"))))*.