Perhaps you should try some spelling variations:
"adan una investigacion" » "adan la investigacion", "adan e investigacion", "adan ciencia investigacion", "adan unla investigacion", "adan une investigacion", "adan unen investigacion", "sagan una investigacion", "adan a investigacion", "adan en investigacion"
"lujan de investigacion" » "lujan la investigacion", "juan de investigacion"
"lacan a investigacion" » "lacan la investigacion", "lacan e investigacion", "lacan en investigacion", "lacan y investigacion", "bacan a investigacion", "atacan a investigacion"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lacan a investigacion") OR ("adan una investigacion"))) OR ("lujan de investigacion"))~.
• Removing quotes may allow a broader search: (((( lacan a investigacion ) or ( adan una investigacion ))) or ( lujan de investigacion ))~.
• Adding a wildcard symbol may retrieve word variants: (((("lacan a investigacion") or ("adan una investigacion"))) or ("lujan de investigacion"))*.