Perhaps you should try some spelling variations:
"biblioteca salvador alvaro del pensamiento critico;" » "biblioteca saavedra alvaro del pensamiento critico;", "biblioteca salvador alvaro de pensamiento critico;", "biblioteca salvador alvarez del pensamiento critico;", "biblioteca salvador alvaro del pensamiento critica;"
"biblioteca calvino fajardo de pensamiento politico;" » "biblioteca javier fajardo de pensamiento politico;", "biblioteca paulino fajardo de pensamiento politico;", "biblioteca calvino fajardo el pensamiento politico;", "biblioteca calvino fajardo y pensamiento politico;"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("biblioteca calvino fajardo de pensamiento politico;") or ("biblioteca salvador alvaro del pensamiento critico;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("biblioteca calvino fajardo de pensamiento politico;") OR ("biblioteca salvador alvaro del pensamiento critico;")).
• Removing quotes may allow a broader search: (( biblioteca calvino fajardo de pensamiento politico; ) or ( biblioteca salvador alvaro del pensamiento critico; )).
• Adding a wildcard symbol may retrieve word variants: (("biblioteca calvino fajardo de pensamiento politico;") or ("biblioteca salvador alvaro del pensamiento critico;"))*.