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