Perhaps you should try some spelling variations:
"sagan una investigacion" » "sagan la investigacion", "sagan de investigacion", "sagan e investigacion"
"lacan ma investigacion" » "lacan la investigacion", "lacan a investigacion", "lacan iap investigacion", "lucan ma investigacion", "lacan y investigacion", "bacan a investigacion"
"lujan ma investigacion" » "lujan la investigacion", "lujan a investigacion", "lujan iap investigacion", "lucan ma investigacion", "lujan mora investigacion", "lujan 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: (((("lacan ma investigacion") or ("sagan una investigacion"))) or ("lujan ma investigacion"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lacan ma investigacion") OR ("sagan una investigacion"))) OR ("lujan ma investigacion")).
• Removing quotes may allow a broader search: (((( lacan ma investigacion ) or ( sagan una investigacion ))) or ( lujan ma investigacion )).
• Adding a wildcard symbol may retrieve word variants: (((("lacan ma investigacion") or ("sagan una investigacion"))) or ("lujan ma investigacion"))*.