Perhaps you should try some spelling variations:
"lacan una investigacion" » "lacan la investigacion", "lacan e investigacion", "lacan ciencia investigacion", "lacan unla investigacion", "lacan une investigacion", "lacan unen investigacion", "sagan una investigacion", "adan una investigacion"
"lujan de investigacion" » "lujan la investigacion", "juan de investigacion"
"atacan a investigacion" » "atacan la investigacion", "atacan e investigacion", "atacan en investigacion", "catalan a investigacion", "atacama a investigacion", "atacar al 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: (((("atacan a investigacion") or ("lacan una investigacion"))) or ("lujan de investigacion"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("atacan a investigacion") OR ("lacan una investigacion"))) OR ("lujan de investigacion")).
• Removing quotes may allow a broader search: (((( atacan a investigacion ) or ( lacan una investigacion ))) or ( lujan de investigacion )).
• Adding a wildcard symbol may retrieve word variants: (((("atacan a investigacion") or ("lacan una investigacion"))) or ("lujan de investigacion"))*.