Perhaps you should try some spelling variations:
mitigation techniques » imputation techniques
floatation technique » inhalation technique, implantation technique, imputation techniques
ko2 floatation » _ floatation
co mitigation » _ mitigation, _ litigation, co limitation
based ko2 » based no2, based k
based co » based code, based no2, based two

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: (( learning-based ko2 floatation technique ) OR ( learning-based co mitigation techniques ))~.
• Adding a wildcard symbol may retrieve word variants: (( learning-based ko2 floatation technique ) or ( learning-based co mitigation techniques ))*.