Perhaps you should try some spelling variations:
"plantas foca investigacion" » "plantas una investigacion", "plantas de investigacion", "plantas e investigacion", "plantas cuba investigacion", "plantas para investigacion", "plantas a investigacion"
"plantas con investigacion" » "plantas en investigacion", "plantas fcsh investigacion", "plantas de investigacion", "plantas cuba investigacion"
"secas la investigacion" » "secas de investigacion", "lucas la investigacion"

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 ((("plantas con investigacion") OR ("plantas foca investigacion"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("secas la investigacion") OR ((("plantas con investigacion") OR ("plantas foca investigacion")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"secas la investigacion\") or (((\"plantas con investigacion\") OR (\"plantas foca investigacion\"))))".
• Removing quotes may allow a broader search: (( secas la investigacion ) or ((( plantas con investigacion ) OR ( plantas foca investigacion )))).
• Adding a wildcard symbol may retrieve word variants: (("secas la investigacion") or ((("plantas con investigacion") OR ("plantas foca investigacion"))))*.