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

Try widening your search to All Fields.

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