Perhaps you should try some spelling variations:
"lucan una investigacion" » "lucan de investigacion", "lucan e investigacion", "lucan ciencia investigacion", "lucas unas investigacion", "lucan ma investigacion", "lucas un investigacion"
"lucan la investigacion" » "lucan ma investigacion", "lucanor la investigacion", "duncan la investigacion"
"lucas la investigacion" » "lucan ma investigacion", "lucas el investigacion", "lucas un 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: (("lucan una investigacion") or ((("lucan la investigacion") OR ("lucas la investigacion"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("lucan una investigacion") OR ((("lucan la investigacion") OR ("lucas la investigacion")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"lucan una investigacion\") or (((\"lucan la investigacion\") OR (\"lucas la investigacion\"))))".
• Removing quotes may allow a broader search: (( lucan una investigacion ) or ((( lucan la investigacion ) OR ( lucas la investigacion )))).
• Adding a wildcard symbol may retrieve word variants: (("lucan una investigacion") or ((("lucan la investigacion") OR ("lucas la investigacion"))))*.