Perhaps you should try some spelling variations:
"electrical engineer's" » "electrical engineers", "electrical engine", "electric engineering"
"electrical machineers" » "electrical machines", "electrical machinery", "electrical machine"
"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 engineering") OR ((("electrical engineer's") OR ("genetic engineering"))))) OR ((("electrical line") OR ("electrical machineers")))).
• Removing quotes may allow a broader search: (((( electrical engineering ) or ((( electrical engineer's ) or ( genetic engineering ))))) or ((( electrical line ) or ( electrical machineers )))).
• Adding a wildcard symbol may retrieve word variants: (((("electrical engineering") or ((("electrical engineer's") or ("genetic engineering"))))) or ((("electrical line") or ("electrical machineers"))))*.