Perhaps you should try some spelling variations:
"electrical engineer'ss's" » "electrical engineers", "electrical engineerss's", "electrical engines's", "electronics engineerss's"
"electrical engineer's" » "electrical engineers", "electrical engine", "electronics engineers"
"electric engineering" » "electronic engineering", "electronics engineering", "genetic engineering"
"practical engineer" » "practical engineering", "electrical engineers"

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's") OR ("electric engineering"))) OR ((((("electrical engineer'ss's") OR ("practical engineer"))) OR ("electrical engineering")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"electrical engineer's\") OR (\"electric engineering\"))) or (((((\"electrical engineer'ss's\") or (\"practical engineer\"))) or (\"electrical engineering\"))))".
• Removing quotes may allow a broader search: (((( electrical engineer's ) OR ( electric engineering ))) or ((((( electrical engineer'ss's ) or ( practical engineer ))) or ( electrical engineering )))).
• Adding a wildcard symbol may retrieve word variants: (((("electrical engineer's") OR ("electric engineering"))) or ((((("electrical engineer'ss's") or ("practical engineer"))) or ("electrical engineering"))))*.