Perhaps you should try some spelling variations:
"mechanical engineering discoveries" » "mechanical engineering discovering", "mechanical engineering discovery", "mechanical engineering fisheries", "electrical engineering discoveries"
"mechanical engineering properties" » "electrical engineering properties", "mechanical engineering processes", "mechanical engineering projects", "mechanical engineering proceedings"

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: (("mechanical engineering properties") OR ("mechanical engineering discoveries")).
• Removing quotes may allow a broader search: (( mechanical engineering properties ) or ( mechanical engineering discoveries )).
• Adding a wildcard symbol may retrieve word variants: (("mechanical engineering properties") or ("mechanical engineering discoveries"))*.