Perhaps you should try some spelling variations:
"brechas de investigacion" » "brechas dde investigaciones", "brechas del investigacion", "brecha de investigacion", "brechas y investigacion"
"luchar e investigacion" » "luchar de investigaciones", "luchas de investigacion", "lucha de investigacion", "lucha en investigacion"
"becas la investigacion" » "secas la investigacion", "brechas la investigacion", "beiras la 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: (((("becas la investigacion") or ("brechas de investigacion"))) or ("luchar e investigacion"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("becas la investigacion") OR ("brechas de investigacion"))) OR ("luchar e investigacion")).
• Removing quotes may allow a broader search: (((( becas la investigacion ) or ( brechas de investigacion ))) or ( luchar e investigacion )).
• Adding a wildcard symbol may retrieve word variants: (((("becas la investigacion") or ("brechas de investigacion"))) or ("luchar e investigacion"))*.