Perhaps you should try some spelling variations:
"neira ana investigacion" » "neira una investigacion", "neira para investigacion", "neira la investigacion"
"vieira ana investigacion" » "vieira una investigacion", "vieira para investigacion", "vieira 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: (("secas de investigacion") or ((("neira ana investigacion") or ("vieira ana investigacion"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("secas de investigacion") OR ((("neira ana investigacion") OR ("vieira ana investigacion")))).
• Removing quotes may allow a broader search: (( secas de investigacion ) or ((( neira ana investigacion ) or ( vieira ana investigacion )))).
• Adding a wildcard symbol may retrieve word variants: (("secas de investigacion") or ((("neira ana investigacion") or ("vieira ana investigacion"))))*.