Perhaps you should try some spelling variations:
mitigation techniques » imputation techniques
floatation technique » inhalation technique, implantation technique, imputation techniques
sensor mitigation » error mitigation
gas sensor » gas sensors
based code » based anode

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( learning-gas sensor mitigation techniques ) OR ( learning-based code floatation technique ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( learning-gas sensor mitigation techniques ) OR ( learning-based code floatation technique ))".
• Adding a wildcard symbol may retrieve word variants: (( learning-gas sensor mitigation techniques ) OR ( learning-based code floatation technique ))*.