Perhaps you should try some spelling variations:
"sobre quimica publicaciones." » "sobre publica publicaciones.", "sobre ciencia publicaciones.", "sobre critica publicaciones.", "sobre fisica publicaciones.", "entre quimica publicaciones."
"serie politica publica." » "serie politicas publicas.", "serie politicas publica.", "serie policiaca publica.", "sobre politica publica."
"elite politica para." » "elites politicas para.", "etica politica para.", "entre politica para.", "elite politicas para.", "elite politica agraria."

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: (("sobre quimica publicaciones.") or ((("elite politica para.") or ("serie politica publica."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("sobre quimica publicaciones.") OR ((("elite politica para.") OR ("serie politica publica.")))).
• Removing quotes may allow a broader search: (( sobre quimica publicaciones. ) or ((( elite politica para. ) or ( serie politica publica. )))).
• Adding a wildcard symbol may retrieve word variants: (("sobre quimica publicaciones.") or ((("elite politica para.") or ("serie politica publica."))))*.