Perhaps you should try some spelling variations:
"power electronics, electric machinery and networks" » "power electronics, electric machines and networks"
"power electronics, electrical machines and networks" » "power electronics, electric machiness and networks", "power electronics, practical machines and networks"
"power electronics, electrical machine and networks" » "power electronics, electric machines and networks", "power electronics, practical machine and networks"

Try widening your search to All Fields.

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: (("power electronics, electric machinery and networks") OR ((("power electronics, electrical machines and networks") OR ("power electronics, electrical machine and networks")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"power electronics, electric machinery and networks\") or (((\"power electronics, electrical machines and networks\") OR (\"power electronics, electrical machine and networks\"))))".
• Removing quotes may allow a broader search: (( power electronics, electric machinery and networks ) or ((( power electronics, electrical machines and networks ) OR ( power electronics, electrical machine and networks )))).
• Adding a wildcard symbol may retrieve word variants: (("power electronics, electric machinery and networks") or ((("power electronics, electrical machines and networks") OR ("power electronics, electrical machine and networks"))))*.