Perhaps you should try some spelling variations:
"electrical machineer's" » "electrical machines", "electrical machinery", "electrical machine"
"electrical engineers" » "mechanical engineers", "chemical engineers"
"electrical line" » "electrical life", "electrical engine", "electrical aging"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("electrical machineer's") OR ("electrical engineers"))) OR ("electrical line"))) OR ("electrical engineering")).
• Removing quotes may allow a broader search: (((((( electrical machineer's ) or ( electrical engineers ))) or ( electrical line ))) or ( electrical engineering )).
• Adding a wildcard symbol may retrieve word variants: (((((("electrical machineer's") or ("electrical engineers"))) or ("electrical line"))) or ("electrical engineering"))*.