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

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 no2 implantation technique ) or ( learning-based two mitigation techniques ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-based no2 implantation technique ) OR ( learning-based two mitigation techniques )).
• Adding a wildcard symbol may retrieve word variants: (( learning-based no2 implantation technique ) or ( learning-based two mitigation techniques ))*.