Perhaps you should try some spelling variations:
"micro and nano technologies sensors" » "micro and nano technologies sensor", "micro and nano technology sensors", "micro and nano technologies sest", "micro and nanotechnologies _ sensors"
"micro and nano technologies serious" » "micro and nano technologies services", "micro and nano methodologies serious", "micro and nano technologies section", "micro and nanotechnologies _ serious", "micro and nano technology serious"
"micro and nano technologies second" » "micro and nano technologies social", "micro and nano technologies select", "micro and nanotechnologies _ second", "micro and nano technology second"

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: (((("micro and nano technologies serious") OR ("micro and nano technologies sensors"))) OR ("micro and nano technologies second")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"micro and nano technologies serious\") OR (\"micro and nano technologies sensors\"))) or (\"micro and nano technologies second\"))".
• Removing quotes may allow a broader search: (((( micro and nano technologies serious ) OR ( micro and nano technologies sensors ))) or ( micro and nano technologies second )).
• Adding a wildcard symbol may retrieve word variants: (((("micro and nano technologies serious") OR ("micro and nano technologies sensors"))) or ("micro and nano technologies second"))*.