Perhaps you should try some spelling variations:
"electrooptics engineering" » "electrooptics bioengineering", "electrooptics engineered", "electronic engineering"
"electronics engineering" » "electronic engineering", "electrical engineering"
"electrical engineer's" » "electrical engineering", "electrical engine", "electric engineering", "electrical engine's", "electrical engineering's", "practical engineer's"
"electrical engineers" » "electrical engineering", "mechanical engineers", "chemical engineers", "electrical engines", "electrical engineerings", "practical engineers"
"electrical engineer" » "electrical engine", "electrical engineering", "practical engineer"

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