Perhaps you should try some spelling variations:
"electric multiples unit" » "electrica multiples unit", "electrico multiples unit", "electricas multiples unit"
"electric multiple units" » "electrica multiple units", "electrico multiple units", "electricas multiple units"
"electricos multiple units" » "electricaos multiple units", "electricoos multiple units", "electricasos multiple units", "electronicos multiple units", "electrica multiple units"

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

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