Perhaps you should try some spelling variations:
techinical report » technical report, technical reports, technical reporting
technical results » technique results, technical reports, clinical results
clinical report » clinical reports, clinical records, clinical response

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: ((((techinical report) OR (technical results))) OR (clinical report)).
• Adding a wildcard symbol may retrieve word variants: ((((techinical report) or (technical results))) or (clinical report))*.