Perhaps you should try some spelling variations:
"electrical engineers" » "electrical engineering", "chemical engineers"
"mechanical engineers" » "mechanical engineering"
"electrical line" » "electrical life", "electrical engine", "electrical aging"
"electrical load" » "electricity load"

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