Perhaps you should try some spelling variations:
"becas carte investigacion" » "becas arte investigacion", "becas caribe investigacion", "becas arte investigaciones"
"basicas una investigacion" » "basicas la investigacion", "basicas e investigacion", "basicas ciencia investigacion", "basica una investigacion", "basicos una investigacion", "basicas uned investigacion"
"becas de investigacion" » "becas 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: (("becas de investigacion") or ((("becas carte investigacion") or ("basicas una investigacion"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("becas de investigacion") OR ((("becas carte investigacion") OR ("basicas una investigacion")))).
• Removing quotes may allow a broader search: (( becas de investigacion ) or ((( becas carte investigacion ) or ( basicas una investigacion )))).
• Adding a wildcard symbol may retrieve word variants: (("becas de investigacion") or ((("becas carte investigacion") or ("basicas una investigacion"))))*.