Perhaps you should try some spelling variations:
"sagan una investigacion" » "sagan la investigacion", "sagan e investigacion", "sagan ciencia investigacion", "sagan unla investigacion", "sagan une investigacion", "sagan unen 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 ("sagan una investigacion"))) OR ("lujan de investigacion"))~.
• Removing quotes may allow a broader search: (((( lacan a investigacion ) or ( sagan una investigacion ))) or ( lujan de investigacion ))~.
• Adding a wildcard symbol may retrieve word variants: (((("lacan a investigacion") or ("sagan una investigacion"))) or ("lujan de investigacion"))*.