Perhaps you should try some spelling variations:
"electrical machine" » "electrical machines", "electric machines", "electric machinery"
"electrical engine" » "electrical engineers", "electrical aging", "electrical engineer's"
"electrical line" » "electrical aging", "electrical bio", "electrical brain"
"electrical life" » "electrical loads"
"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 engine") OR ((((((("electrical line") OR ("electrical machine"))) OR ("electrical life"))) OR ("electrical load")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"electrical engine\") or (((((((\"electrical line\") OR (\"electrical machine\"))) or (\"electrical life\"))) or (\"electrical load\"))))".
• Removing quotes may allow a broader search: (( electrical engine ) or ((((((( electrical line ) OR ( electrical machine ))) or ( electrical life ))) or ( electrical load )))).
• Adding a wildcard symbol may retrieve word variants: (("electrical engine") or ((((((("electrical line") OR ("electrical machine"))) or ("electrical life"))) or ("electrical load"))))*.