Perhaps you should try some spelling variations:
"lucha contra investigacion" » "lucha cultura investigacion", "lucha entre investigacion", "lucha cognitiva investigacion", "lucha portra investigacion", "lucha entra investigacion"
"lucha con investigacion" » "lucha en investigacion", "lucha foca investigacion", "lucha fcsh investigacion", "lucha por investigacion"
"becas la investigacion" » "secas la investigacion", "brechas la investigacion", "beiras 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: (("becas la investigacion") or ((("lucha con investigacion") OR ("lucha contra investigacion"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("becas la investigacion") OR ((("lucha con investigacion") OR ("lucha contra investigacion")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"becas la investigacion\") or (((\"lucha con investigacion\") OR (\"lucha contra investigacion\"))))".
• Removing quotes may allow a broader search: (( becas la investigacion ) or ((( lucha con investigacion ) OR ( lucha contra investigacion )))).
• Adding a wildcard symbol may retrieve word variants: (("becas la investigacion") or ((("lucha con investigacion") OR ("lucha contra investigacion"))))*.