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