Perhaps you should try some spelling variations:
"electrico multiple unit" » "electricos multiple unit", "electric multiple unit", "electronico multiple unit", "electrico multiple units"
"electrico multiples unit" » "electricos multiples unit", "electric multiples unit", "electronico multiples unit", "electrico multiples units"
"electrica multiples unit" » "electrica multiples units", "electronica multiples unit"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("electrico multiple unit") OR ((("electrico multiples unit") OR ("electrica multiples unit"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"electrico multiple unit\") OR (((\"electrico multiples unit\") OR (\"electrica multiples unit\"))))".
• Removing quotes may allow a broader search: (( electrico multiple unit ) OR ((( electrico multiples unit ) OR ( electrica multiples unit )))).
• Adding a wildcard symbol may retrieve word variants: (("electrico multiple unit") OR ((("electrico multiples unit") OR ("electrica multiples unit"))))*.