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