Perhaps you should try some spelling variations:
"neira maria investigaciones" » "neira macias investigaciones", "neira para investigaciones", "neira mira investigaciones", "neira marian investigaciones", "eneida maria investigaciones", "nora maria investigaciones"
"lucas un investigacion" » "lucas en investigacion", "lucas con investigacion", "lucas adn investigacion", "lucas el investigacion", "lucas la investigacion"
"becas de investigacion" » "becas 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: (((("lucas un investigacion") or ("becas de investigacion"))) or ("neira maria investigaciones"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lucas un investigacion") OR ("becas de investigacion"))) OR ("neira maria investigaciones")).
• Removing quotes may allow a broader search: (((( lucas un investigacion ) or ( becas de investigacion ))) or ( neira maria investigaciones )).
• Adding a wildcard symbol may retrieve word variants: (((("lucas un investigacion") or ("becas de investigacion"))) or ("neira maria investigaciones"))*.