Perhaps you should try some spelling variations:
"microscopia electronica diaz garrido" » "microscopia electronica de garrido", "microscopia electronica del garrido", "microscopia electronica al garrido", "microscopia electronica diaz carrillo", "microscopia electronica diaz barreiro", "microscopia electronica diaz garcia"
"microscopia electronica s.a garcia" » "microscopia electrica s.a garcia", "microscopia electronica 5.1 garcia", "microscopia electronica para garcia", "microscopia electronica osma garcia", "microscopia electronica ossa garcia", "microscopia electronica sosa garcia"
"microscopia electronica a garrido" » "microscopia electronica al garrido", "microscopia electronica la garrido", "microscopia electronicas a garrido", "microscopia electronica p garrido", "microscopia electronica de garrido", "microscopia electronica pena garrido"

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: (((("microscopia electronica diaz garrido") OR ("microscopia electronica a garrido"))) or ("microscopia electronica s.a garcia"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("microscopia electronica diaz garrido") OR ("microscopia electronica a garrido"))) OR ("microscopia electronica s.a garcia")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"microscopia electronica diaz garrido\") OR (\"microscopia electronica a garrido\"))) or (\"microscopia electronica s.a garcia\"))".
• Removing quotes may allow a broader search: (((( microscopia electronica diaz garrido ) OR ( microscopia electronica a garrido ))) or ( microscopia electronica s.a garcia )).
• Adding a wildcard symbol may retrieve word variants: (((("microscopia electronica diaz garrido") OR ("microscopia electronica a garrido"))) or ("microscopia electronica s.a garcia"))*.