Perhaps you should try some spelling variations:
"flechas e investigacion" » "flechas de investigacion", "flechas de investigaciones", "flechas el investigacion", "flechas en investigacion"
"ruecas la investigacion" » "ruedas la investigacion", "cuencas la investigacion", "cuevas la investigacion"
"becas la investigacion" » "secas la investigacion", "brechas la investigacion", "beiras la investigacion"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("becas la investigacion") or ("ruecas la investigacion"))) or ("flechas e investigacion"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("becas la investigacion") OR ("ruecas la investigacion"))) OR ("flechas e investigacion")).
• Removing quotes may allow a broader search: (((( becas la investigacion ) or ( ruecas la investigacion ))) or ( flechas e investigacion )).
• Adding a wildcard symbol may retrieve word variants: (((("becas la investigacion") or ("ruecas la investigacion"))) or ("flechas e investigacion"))*.