Perhaps you should try some spelling variations:
"mechanical engineers" » "mechanical engineering"
"electrical engineer" » "electrical engineers", "electrical engineer's", "electrical engine"
"electrical engineering" » "electrical engineersing", "electrical engineer'sing", "electrical engineing"

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