Perhaps you should try some spelling variations:
"electrical engineer'ss's" » "electrical engineer's", "electrical engineers", "electrical engineers'ss's", "electrical engineer's'ss's", "practical engineer'ss's"
"electrical engine'ss's" » "electrical engineer's", "electrical engineers"
"practical engineers's" » "practical engineering", "practical engineer", "pratical engineering"
"electrical engineer" » "electrical engineers", "electrical engineer's", "practical engineer"
"electrical engineering" » "electrical engineersing", "electrical engineer'sing", "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 engineer'ss's") OR ("electrical engine'ss's"))) OR ("practical engineers's"))) OR ("electrical engineering"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"electrical engineer\") or (((((((\"electrical engineer'ss's\") OR (\"electrical engine'ss's\"))) or (\"practical engineers's\"))) or (\"electrical engineering\"))))*".
• Removing quotes may allow a broader search: (( electrical engineer ) or ((((((( electrical engineer'ss's ) OR ( electrical engine'ss's ))) or ( practical engineers's ))) or ( electrical engineering ))))*.