Perhaps you should try some spelling variations:
gramatica comparado » gramatica comparativa
"gramatica comparada ley general" » "gramatica comparativa ley general", "gramatica comparada de general", "gramatica comparada y general", "gramatica comparada e general", "gramatica comparada leyes general"
"Gramática comparado de general" » "Gramática comparativo de general", "Gramática comparacion de general", "Gramática comparado del general", "Gramática comparado de genero", "Gramática comparado _ general"

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: (("Gramática comparado de general") or ("gramatica comparada ley general"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("Gramática comparado de general") OR ("gramatica comparada ley general")).
• Removing quotes may allow a broader search: (( Gramática comparado de general ) or ( gramatica comparada ley general )).
• Adding a wildcard symbol may retrieve word variants: (("Gramática comparado de general") or ("gramatica comparada ley general"))*.