Perhaps you should try some spelling variations:
"lucas con investigacion" » "lucas en investigacion", "lucas foca investigacion", "lucas fcsh investigacion", "luchar con investigacion", "lucha con investigacion", "lucas un investigacion"
"placas con investigacion" » "placas en investigacion", "placas foca investigacion", "placas fcsh investigacion", "plantas con investigacion", "placas como investigacion", "plata con 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 con investigacion") OR ("placas con investigacion"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("secas la investigacion") OR ((("lucas con investigacion") OR ("placas con investigacion")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"secas la investigacion\") or (((\"lucas con investigacion\") OR (\"placas con investigacion\"))))".
• Removing quotes may allow a broader search: (( secas la investigacion ) or ((( lucas con investigacion ) OR ( placas con investigacion )))).
• Adding a wildcard symbol may retrieve word variants: (("secas la investigacion") or ((("lucas con investigacion") OR ("placas con investigacion"))))*.