Perhaps you should try some spelling variations:
techinical report » technical report, technical reporting, technical support
technical reports » technical report, technical results, technical support
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 reports))) OR (clinical report)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((techinical report) OR (technical reports))) or (clinical report))".
• Adding a wildcard symbol may retrieve word variants: ((((techinical report) OR (technical reports))) or (clinical report))*.