Perhaps you should try some spelling variations:
mitigation techniques » imputation techniques
floatation technique » inhalation technique, implantation technique, imputation techniques
n mitigation » _ mitigation, _ litigation
based code » based anode
based n » based _, based k, based no2

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: "(( learning-based code floatation technique ) OR ( learning-based n mitigation techniques ))~".
• Adding a wildcard symbol may retrieve word variants: (( learning-based code floatation technique ) OR ( learning-based n mitigation techniques ))*.