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