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