Perhaps you should try some spelling variations:
practical engineering » optical engineering, physical engineering, acoustical engineering
electrical engineers » mechanical engineers, chemical engineers
electrical engineer » electrical engineer's, electrical engine, 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 ((( practical engineering ) OR ( electrical engineering )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( electrical engineer ) OR ( electrical engineers ))) or ((( practical engineering ) or ( electrical engineering ))))".
• Adding a wildcard symbol may retrieve word variants: (((( electrical engineer ) OR ( electrical engineers ))) or ((( practical engineering ) or ( electrical engineering ))))*.