Perhaps you should try some spelling variations:
"mediaciones pedagogicas" » "mediacion pedagogica", "implicaciones pedagogicas", "expediciones pedagogicas"
"educaciones pedagogias" » "implicaciones pedagogicas", "innovaciones pedagogicas", "expediciones pedagogicas"
"innovacion tecnologica" » "innovaciones tecnologicas"
"innovacion pedagogica" » "investigacion pedagogica"

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: (((("mediaciones pedagogicas") or ("educaciones pedagogias"))) or ((("innovacion pedagogica") OR ("innovacion tecnologica"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mediaciones pedagogicas") OR ("educaciones pedagogias"))) OR ((("innovacion pedagogica") OR ("innovacion tecnologica")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"mediaciones pedagogicas\") or (\"educaciones pedagogias\"))) or (((\"innovacion pedagogica\") OR (\"innovacion tecnologica\"))))".
• Removing quotes may allow a broader search: (((( mediaciones pedagogicas ) or ( educaciones pedagogias ))) or ((( innovacion pedagogica ) OR ( innovacion tecnologica )))).
• Adding a wildcard symbol may retrieve word variants: (((("mediaciones pedagogicas") or ("educaciones pedagogias"))) or ((("innovacion pedagogica") OR ("innovacion tecnologica"))))*.