Perhaps you should try some spelling variations:
"brechas las investigacion" » "brechas las investigaciones", "brechas a investigacion", "brechas al investigacion", "brechas la investigacion", "derechos las investigacion"
"hechas las investigacion" » "hechas las investigaciones", "hechas a investigacion", "hechas al investigacion", "fechas la investigacion", "hechos la investigacion"
"beiras la investigacion" » "beira la investigacion", "beiras ana investigacion", "beiras mas 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 la investigacion") or ((("brechas las investigacion") OR ("hechas las investigacion"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("beiras la investigacion") OR ((("brechas las investigacion") OR ("hechas las investigacion")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"beiras la investigacion\") or (((\"brechas las investigacion\") OR (\"hechas las investigacion\"))))".
• Removing quotes may allow a broader search: (( beiras la investigacion ) or ((( brechas las investigacion ) OR ( hechas las investigacion )))).
• Adding a wildcard symbol may retrieve word variants: (("beiras la investigacion") or ((("brechas las investigacion") OR ("hechas las investigacion"))))*.