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"
"secas de investigacion" » "secas la investigacion", "becas de investigacion", "secado de investigacion", "cas de 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 ("secas de investigacion"))) or ("neira maria investigaciones"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lucas un investigacion") OR ("secas de investigacion"))) OR ("neira maria investigaciones")).
• Removing quotes may allow a broader search: (((( lucas un investigacion ) or ( secas de investigacion ))) or ( neira maria investigaciones )).
• Adding a wildcard symbol may retrieve word variants: (((("lucas un investigacion") or ("secas de investigacion"))) or ("neira maria investigaciones"))*.