Perhaps you should try some spelling variations:
"institute of electrical and electrical engineers" » "institute of electrical and electrical engineering", "institute of electrical and chemical engineers", "institute of electrical and electric engineering"
"institute of electrical and mechanical engineers" » "institute of electrical and mechanical engineering"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"institute of electrical and electrical engineers\") OR (\"institute of electrical and mechanical engineers\"))".
• Removing quotes may allow a broader search: (( institute of electrical and electrical engineers ) OR ( institute of electrical and mechanical engineers )).
• Adding a wildcard symbol may retrieve word variants: (("institute of electrical and electrical engineers") OR ("institute of electrical and mechanical engineers"))*.