Perhaps you should try some spelling variations:
"biotechnology and microengineering" » "biotechnology and bioengineering", "biotechnology and geoengineering", "biotechnology and reengineering"
"technology and microengineering" » "technology and bioengineering", "technology and geoengineering", "technology and reengineering"

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: "((\"biotechnology and microengineering\") OR (\"technology and microengineering\"))".
• Removing quotes may allow a broader search: (( biotechnology and microengineering ) OR ( technology and microengineering )).
• Adding a wildcard symbol may retrieve word variants: (("biotechnology and microengineering") OR ("technology and microengineering"))*.