Perhaps you should try some spelling variations:
"mechanical engineers" » "mechanical engineering"
"electrical lineers" » "electrical linear", "electrical engineers", "electrical line"
"electrical engine" » "electrical engineers", "electrical aging", "electrical line"

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 engine") OR ((("electrical lineers") OR ("mechanical engineers")))).
• Removing quotes may allow a broader search: (( electrical engine ) or ((( electrical lineers ) or ( mechanical engineers )))).
• Adding a wildcard symbol may retrieve word variants: (("electrical engine") or ((("electrical lineers") or ("mechanical engineers"))))*.