Perhaps you should try some spelling variations:
"electrical engineer's" » "electrical engineering", "electrical engine", "electric engineering"
"electrical engineers" » "electrical engineering", "chemical engineers"
"mechanical engineers" » "mechanical engineering"

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