Perhaps you should try some spelling variations:
mitigation techniques » imputation techniques
floatation technique » inhalation technique, implantation technique, imputation techniques
two mitigation » _ mitigation, error mitigation
n floatation » _ floatation
based two » based tool, based co
based n » based _, based k, based no2

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

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